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Number Sense practice · no-sign-up sample

Mental Math sample · Grades 7–8

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

Question 1 of 5

Mental multiplication - free strategy

What is 18 x 35?

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Split a factor to make a friendly product

For 18 x 35, split 18 into 20 - 2 so each product is easy to calculate.

  1. 20 x 35 = 700.
  2. 2 x 35 = 70.
  3. 700 - 70 = 630.

Question 2 of 5

Square numbers

What is 25 squared?

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Question 3 of 5

Percent

What is 15% of 80?

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Question 4 of 5

Integer operations

What is -7 + 15?

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Question 5 of 5

Ratio

If 3 notebooks cost $12, what do 5 cost at the same rate?

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