Choose another sample

Number Sense practice · no-sign-up sample

Mental Math sample · Grades 3–4

Five short questions with a real teaching moment. On a phone, move through one clear question at a time.

Question 1 of 5

Number Sense - free strategy

What is 39 + 24?

Need help?
Learn the strategy

Use a nearby ten

To add 39 + 24 quickly, make 39 into 40, then adjust once.

  1. Add 1 to 39 to make 40.
  2. 40 + 24 = 64.
  3. Subtract the 1 you added: 63.

Question 2 of 5

Multiply by 10

What is 47 x 10?

Need help?

Question 3 of 5

Friendly subtraction

What is 81 - 29?

Need help?

Question 4 of 5

Place value

What is 600 + 80 + 5?

Need help?

Question 5 of 5

Doubling

What is double 36?

Need help?