# Subtract 10 or 100 From Any Number

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## Interactive Math Activity - Subtracting 10 or 100 from Any Number

Here's a fun, interactive math game you can try out with your second graders to practice subtracting ten or one hundred from any number. Students will put their subtraction skills to the test by becoming familiar with mentally subtracting ten or one hundred from a given number 100 through 900. By the time your students complete this interactive subtraction game, they will have gained confidence and proficiency with subtracting ten or one hundred from any number!

Children will be challenged to solve a variety of subtraction problems in this second grade math lesson. Here are a few sample questions you can expect from this I Know It activity: "971 – 10 =" "Subtract 100 from 707," and "801 – 100 =" If students need a little extra help solving a subtraction problem, they can click on the "Hint" button. The hint will provide a written and/or pictorial clue that will point students in the right direction without giving away the answer. When students get an answer wrong, a detailed explanation page will appear, displaying the right answer accompanied by an easy-to-understand explanation. Students will progress through this math activity having learned from earlier mistakes.

This online subtraction activity comes equipped with several built-in features that help children make the most out of their math practice session. A speaker icon in the upper-left corner of the practice screen indicates the read-aloud feature. Students can click this button to have the question read out loud to them in a clear voice. This is a great option for ESL/ELL students and children who excel with auditory learning. A progress-tracker, opposite, shows students how many questions they have left to answer in their practice session. A score-tracker beneath that shows students how many points they have earned so far for correct answers. Every feature in the I Know It math lessons is designed with your students' math achievement in mind.

## I Know It Is a Fantastic Digital Math Practice Resource

Elementary teachers, homeschool educators, and school administrators alike agree: I Know It is a fantastic supplementary math practice tool for elementary students! Used alongside a comprehensive math curriculum, I Know It online math activities make math practice fun and exciting for kids. Educators can choose from a wide variety of popular elementary math topics from kindergarten through fifth grade to help their students strengthen math skills. Every one of our engaging math practice activities is thoughtfully designed by accredited elementary math teachers to meet at least one (often more) Common Core Standard. It's easy to find and assign math practice activities in just a few clicks. Now let's see why kids can't wait to dive into math practice!

Children love practicing their math skills with the fun, educational I Know It math program. Each math activity presents as a fun, yet challenging, math game. Adorable, animated characters do a silly dance or a clever trick each time students answer a math question correctly. Plenty of positive feedback messages encourage little ones to "Keep going!" even when they make a mistake. Plus, it's fun for kids to earn math awards for their virtual trophy case every time they master a new math skill. Make no mistake—math practice is a blast with iKnowIt.com!

We hope you and your class will have a lot of fun trying out this second grade subtraction activity. Be sure to explore the hundreds of second grade math lessons in our online collection too.

## Learn About Free Trial and Membership Options

Looking for a way to try out the I Know It math practice program to see if it's right for your class? We've got you covered! Sign up for our free thirty-day trial offer to try out any of the math activities on "I Know It," including this second grade subtraction game, at no cost! We're confident you and your students will love the difference interactive math practice can make. When your free trial runs out, we hope you won't hesitate to join the I Know It community as a member. This way, you and your class will continue to enjoy the benefits of online math practice for a full calendar year. We have membership options for families, individual teachers, schools, and school districts. Check out our membership information page to discover which I Know It membership is perfect for you: https://www.iknowit.com/order.html.

## Level

This interactive math lesson is classified as Level B. It may be ideal for second grade students.

## Common Core Standard

2.NBT.8
Numbers and Operations in Base Ten

Students will use their understanding of place value and the properties of operations to add and subtract. Students will mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.

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