Estimating Sums and Differences

Estimating Sums and Differences

Assessment

Flashcard

Mathematics

3rd Grade

Practice Problem

Hard

CCSS
3.NBT.A.1, 4.NBT.B.5, 4.NBT.A.3

Standards-aligned

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is estimation?

Back

Estimation is a way to find a number that is close enough to the right answer, usually with some thought about the numbers involved.

2.

FLASHCARD QUESTION

Front

How do you estimate a sum?

Back

To estimate a sum, round each number to the nearest ten or hundred, then add those rounded numbers.

3.

FLASHCARD QUESTION

Front

What is the difference between exact and estimated answers?

Back

Exact answers are the precise results of calculations, while estimated answers are close approximations.

4.

FLASHCARD QUESTION

Front

Why is estimating useful?

Back

Estimating helps us quickly check if an answer is reasonable and can save time in calculations.

5.

FLASHCARD QUESTION

Front

What is rounding?

Back

Rounding is changing a number to a nearby value that is easier to work with, often to the nearest ten or hundred.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

6.

FLASHCARD QUESTION

Front

Estimate the sum of 47 and 36 by rounding.

Back

Round 47 to 50 and 36 to 40. The estimated sum is 50 + 40 = 90.

7.

FLASHCARD QUESTION

Front

Estimate the difference of 82 and 29 by rounding.

Back

Round 82 to 80 and 29 to 30. The estimated difference is 80 - 30 = 50.

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