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Topics
3. Subtraction
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United States of AmericaUT
Grade 3

3.03 Estimation first

Lesson
Practice
Lesson

Are you ready?

Do you remember how to estimate the answer to an addition problem?

Choose the right answer.

  1. $$143+33 will be in the:

    $$100s

    A

    $$200s

    B

Learn

Let's see how we can estimate the answer to a subtraction problem, by rounding our numbers first.

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Apply

Choose the right answer.

  1. $$38−6 will be in the:

    $$30s

    A

    $$20s

    B

Remember!

When we need to solve a subtraction problem, we can still round our numbers to the nearest $$10 or $$100, just as we would for addition. We don't need the exact answer so this gives us an idea of what our answer should be close to.

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