multiplying by 9 hand trick
The hand trick for multiplying by 9 is a popular and efficient method for solving multiplication problems. This simple yet effective technique has been used by students, teachers, and parents for generations. By using your hands as a tool, you can quickly and easily solve multiplication problems involving the number 9 without having to rely on a calculator or traditional multiplication methods. In this article, we will explore the origins of this hand trick, how it works, and why it is a valuable tool for students of all ages.
Origins of the Hand Trick
The origins of the hand trick for multiplying by 9 are not entirely clear. Some sources suggest that it originated in ancient China, while others believe it was developed in India. However, it is safe to say that the trick has been around for a long time and has been passed down through generations. The earliest written record of the hand trick can be traced back to the 12th century, in a book called “Liber Abaci” by Leonardo Fibonacci, an Italian mathematician. In this book, Fibonacci explains the hand trick for multiplying by 9 as a way to simplify complex calculations.
How the Hand Trick Works
The hand trick for multiplying by 9 is based on the concept of place value. Place value is the value of a digit in a number based on its position. For example, in the number 589, the 5 is in the ones place, the 8 is in the tens place, and the 9 is in the hundreds place. In the hand trick, each finger on your hand represents a place value. Your left hand represents the tens place, and your right hand represents the ones place. By using this method, you can quickly determine the answer to a multiplication problem involving the number 9.
To use the hand trick, you first need to assign numbers to your fingers. Starting from your left thumb, assign each finger a number from 1 to 10. Your left thumb represents the number 1, your left index finger represents the number 2, and so on, with your left pinky representing the number 10. Then, do the same for your right hand, with your right thumb representing the number 1, and your right pinky representing the number 10.
Now, let’s look at an example to see how the hand trick works. Let’s say we want to multiply 9 by 6. To do this, we will use our left hand to represent the number 9 and our right hand to represent the number 6. To multiply, we simply bend down the finger on our left hand that represents the number 6, which is our right index finger. Now, we count the number of fingers to the left and to the right of the bent finger. To the left, we have 5 fingers, and to the right, we have 4 fingers. This gives us the answer, 54.
Why the Hand Trick is Valuable
The hand trick for multiplying by 9 is valuable for several reasons. First and foremost, it is a quick and easy way to solve multiplication problems involving the number 9. By using your hands as a tool, you can solve these problems in a matter of seconds, without having to use a calculator or traditional multiplication methods. This makes it a great tool for students who are just learning multiplication or struggle with math in general.
Additionally, the hand trick is a great visual aid for students. Many students struggle with abstract concepts, and the hand trick provides a concrete representation of place value. By using their hands, students can see how the numbers are being multiplied and understand the concept of place value more easily. This can help them build a stronger foundation in math and improve their overall understanding of multiplication.
Moreover, the hand trick is a fun and engaging way to learn multiplication. Instead of just memorizing multiplication tables, students can use their hands to solve problems, making the learning process more interactive and enjoyable. This can also help students who have a difficult time focusing or staying engaged in traditional learning methods.
Using the Hand Trick for More Complex Multiplication Problems
While the hand trick is primarily used for multiplying by 9, it can also be used for more complex multiplication problems. To use the hand trick for larger numbers, you will need to use both hands. Let’s look at an example to see how this works. Let’s say we want to multiply 9 by 27. To do this, we will use our left hand to represent the number 9 and our right hand to represent the number 27. We will start by bending down our right index finger on our right hand, which represents the number 7. Then, we will count the number of fingers to the left and to the right of the bent finger. To the left, we have 2 fingers, and to the right, we have 6 fingers. This gives us the answer, 243.
You can also use the hand trick to multiply by 9 with larger numbers on the left hand. For example, to multiply 99 by 6, you would bend down your right index finger on your left hand, which represents the number 9. Then you would count the number of fingers to the left and to the right of the bent finger. To the left, you have 8 fingers, and to the right, you have 1 finger. This gives you the answer, 594.
In Conclusion
The hand trick for multiplying by 9 is a simple and effective method for solving multiplication problems. By using your hands as a tool, you can quickly and easily find the answer to problems involving the number 9. This technique is not only efficient but also helps students develop a stronger understanding of place value and makes learning multiplication more engaging and enjoyable. So, the next time you come across a multiplication problem involving the number 9, remember the hand trick and see how it can simplify your calculations.
how to hide text messages on iphone lock screen
In today’s digital age, privacy and security are top concerns for many people, especially when it comes to their personal devices. With the rise of smartphones, it has become easier for anyone to access our confidential information, including our text messages. This is why the ability to hide text messages on iPhone lock screen has become a highly sought-after feature. In this article, we will discuss various methods on how to achieve this and keep your messages safe from prying eyes.
Before we dive into the different ways to hide text messages on iPhone lock screen, it’s important to understand why this feature is necessary. For most people, text messages contain sensitive and personal information, whether it’s a conversation with a loved one or important work-related discussions. Having these messages visible on the lock screen can be a major privacy concern, especially if you happen to lose your phone or it gets stolen. By hiding your text messages, you can have peace of mind knowing that your private conversations will remain confidential.
Method 1: Disabling Message Previews
The first and easiest way to hide text messages on iPhone lock screen is by disabling message previews. By default, iOS displays a preview of the message on the lock screen, allowing anyone to read it without unlocking your phone. To turn off message previews, follow these simple steps:
1. Go to Settings on your iPhone and scroll down to “Notifications.”
2. Under Notifications, select “Messages.”
3. Scroll down and find the “Show Previews” option.
4. Toggle off the button next to it.
Once you’ve disabled message previews, your text messages will no longer appear on the lock screen, and only the sender’s name will be displayed. This method is ideal for those who want to keep their messages private without having to go through the hassle of downloading third-party apps or changing settings.
Method 2: Using a Third-Party App
If you want more control over the messages that appear on your lock screen, using a third-party app is a great option. These apps offer advanced features that allow you to hide specific messages or conversations from the lock screen. Some popular apps for this purpose are Secret SMS, CoverMe, and Private Message Box. These apps not only hide your messages but also provide additional security measures such as password protection and self-destruction of messages after a certain period.
To use these apps, simply download them from the App Store and follow the instructions to set them up. Once done, you can choose which messages you want to hide from the lock screen, and they will only appear when you open the app. This method is perfect for those who want to hide specific messages from certain contacts or conversations.
Method 3: Archiving Messages
Another way to keep your messages private on the lock screen is by archiving them. This method is available in the default Messages app on your iPhone and can be used to hide individual or group conversations. Archiving messages will move them to a separate folder within the app, making them invisible on the lock screen. To archive messages, follow these steps:
1. Open the Messages app and swipe left on the conversation you want to hide.
2. Tap “Archive.”
3. The conversation will now be moved to the Archived folder.
To view archived messages, go to the main screen of the Messages app and tap the “Edit” button in the top left corner. You will now see the “Archived” folder, and you can access your hidden conversations from there. This method is ideal for those who want to keep their messages organized and hidden without using third-party apps.
Method 4: Using Siri
If you’re looking for a quick and easy way to hide text messages on iPhone lock screen, using Siri is a great option. Siri, Apple’s virtual assistant, can help you read or reply to messages without unlocking your phone. However, this feature can also be a privacy concern, as anyone can access your messages by using Siri. To disable this feature, follow these steps:
1. Go to Settings and select “Touch ID & Passcode” or “Face ID & Passcode,” depending on your iPhone model.
2. Enter your passcode when prompted.
3. Scroll down and find the “Allow Access When Locked” option.
4. Toggle off “Siri.”
Once this feature is disabled, you will not be able to use Siri to read or reply to messages on the lock screen. This method is perfect for those who want to keep their messages hidden while still being able to use Siri for other tasks.
Method 5: Using Screen Time
Another way to hide text messages on iPhone lock screen is by using the Screen Time feature. This feature allows you to set limits on certain apps and features, including Messages. You can restrict the appearance of messages on the lock screen by setting a passcode for the Messages app. To do this, follow these steps:
1. Go to Settings and select “Screen Time.”
2. Tap “App Limits” and select “Add Limit.”
3. Select “Messages” from the list of apps.
4. Set a passcode for the Messages app when prompted.
Once this is done, you will need to enter the passcode every time you want to access the Messages app, and your messages will not appear on the lock screen. This method is ideal for those who want to restrict access to the Messages app without using a third-party app.
In conclusion, hiding text messages on iPhone lock screen is essential for maintaining your privacy and security. Whether you want to hide all messages or just specific ones, there are various methods to achieve this. By following the steps mentioned above, you can choose the method that suits your needs and keep your confidential conversations hidden from prying eyes. So, take control of your privacy and use these methods to keep your messages safe and secure.
why cell phones should be allowed in school essay
Cell phones have become an integral part of our lives. They have revolutionized the way we communicate, access information, and even conduct our daily activities. However, when it comes to schools, there is often a debate on whether or not cell phones should be allowed. While some argue that cell phones can be a distraction and a tool for cheating, there are many reasons why allowing cell phones in school can actually be beneficial.
In this modern era, where technology is constantly evolving, it is almost impossible to keep students away from cell phones. It has become a necessity for both parents and students alike. Many parents feel a sense of security knowing that their child has a cell phone with them at all times. This allows them to stay connected and be able to reach their child in case of an emergency. Moreover, students who have after-school activities or part-time jobs often rely on their cell phones for communication and scheduling.
One of the main arguments against allowing cell phones in schools is that they can be a major distraction. Students may be tempted to use their phones during class, resulting in a decrease in productivity and learning. However, this argument lacks substance as students have always found ways to distract themselves in class, whether it was passing notes or daydreaming. Banning cell phones in school will not solve the issue of distractions; instead, it will just shift the focus to something else. Furthermore, by allowing cell phones in schools, we can teach students how to use them responsibly and minimize their distractions.
Another benefit of allowing cell phones in schools is that they can enhance learning. With access to the internet, students can easily research and find information relevant to their lessons. This can broaden their knowledge and understanding of a topic, as well as encourage them to be more engaged in their studies. Additionally, many educational apps and resources are available on cell phones, which can aid in learning and make it more interactive and fun for students.
In today’s fast-paced world, it is important to be able to adapt to new technology. By allowing cell phones in schools, we can prepare students for the future, where technology will play an even more significant role. Students need to learn how to use cell phones responsibly and understand the boundaries of using them in public places, such as schools. By banning cell phones, we are depriving students of an opportunity to learn these essential skills.
Moreover, cell phones can also be a valuable tool for communication and collaboration within the classroom. Many classrooms now use online platforms for assignments, discussions, and group projects. Allowing cell phones in schools can make it easier for students to access these platforms and collaborate with their peers. In addition, students who are absent from class due to illness or other reasons can stay updated on classwork and assignments through their cell phones.
Another benefit of allowing cell phones in schools is that it can provide a sense of security for students and staff. In case of a school emergency, students can use their cell phones to call for help or inform their parents. This can be especially helpful in situations where landline phones are not available. Furthermore, with the use of tracking apps, parents and school staff can easily locate a student in case of an emergency. This can give parents peace of mind, knowing that their child can be easily reached in case of any danger.
In addition, allowing cell phones in schools can also reduce the burden on teachers. With access to the internet, students can easily find answers to their questions and complete their assignments without constantly relying on the teacher. This can free up time for teachers to focus on more important tasks, such as planning lessons and providing individualized attention to students who may need extra help.
Furthermore, cell phones can also be used as a learning tool for students with special needs. There are many apps and programs available that can help students with learning disabilities, such as dyslexia, to improve their reading and writing skills. These tools can be easily accessed through cell phones, making it more convenient for students to use them in the classroom.
Allowing cell phones in schools can also bridge the gap between home and school. Parents can stay updated on their child’s progress and communicate with teachers through various apps and online platforms. This can improve parent-teacher communication and involvement, which has been proven to have a positive impact on student achievement.
Moreover, with the rise of online bullying and cyberbullying, allowing cell phones in schools can actually help to prevent such incidents. Students can use their phones to report any bullying or harassment they witness or experience. This can promote a safer and more inclusive school environment where students feel comfortable speaking up about any issues they may be facing.
In conclusion, there are numerous reasons why cell phones should be allowed in schools. They have become an essential tool in our daily lives and can be used to enhance learning, improve communication, and promote a safer and more inclusive school environment. Banning cell phones in schools will not solve the issue of distractions, but rather hinder the potential benefits they can bring. It is important to teach students how to use cell phones responsibly and set boundaries for their use in schools. By embracing technology and allowing cell phones in schools, we can better prepare our students for the future and provide them with the necessary skills to succeed in a technology-driven world.