Processing, please wait...
It was processed successfully!
It was processed successfully!
Create Free Account
Oops! It looks like your security settings are blocking this video 🙁

If you are on a school computer or network, ask your tech person to whitelist these URLs:
*.wistia.com, fast.wistia.com, fast.wistia.net, embedwistia-a.akamaihd.net

Sometimes a simple refresh solves this issue. If you need further help, contact us.

Create a free account to unlock all content!
Get Full Access

Mental Math within 100

LESSON MATERIALSmove Generate Student Link
Mental Math within 100
What you will learn from this videoWhat you will learn
  • How to do mental math with numbers up to 100.
  • How we can use place value to add and subtract in our heads.
  • Explore how doing mental math can help us build a tower, color a rainbow, and take care of mice!
  • Discussion Questions

  • Vocabulary

  • Reading Material

  • Practice Word Problems

  • Practice Number Problems

  • Teacher Resources

    Create Free Account To Unlock
  • Teacher Resources

Explore Our Science Topics
We’ve sent you an email with instructions how to reset your password.
Exit Ticket
Level 1

Add 8 + 7 in your head. What are the steps?

Level 2

Subtract 17 – 9 in your head. What are the steps?

Level 3

Add 17 + 40 in your head.

Choose Your Free Trial Period
3 Days

3 days to access to all of our teaching resources for free.

Continue to Lessons
30 Days

Get 30 days free by inviting other teachers to try it too.

Share with Teachers
Get 30 Days Free
By inviting 4 other teachers to try it too.
4 required

*only school emails accepted.

Skip, I will use a 3 day free trial

Thank You!

Enjoy your free 30 days trial