Mental Math Subtraction

Mental Math Subtraction

Assessment

Flashcard

Mathematics

3rd Grade

Practice Problem

Hard

CCSS
2.NBT.B.5, 3.OA.D.8, 7.NS.A.1C

+6

Standards-aligned

Created by

Wayground Content

FREE Resource

Student preview

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15 questions

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1.

FLASHCARD QUESTION

Front

What is mental math subtraction?

Back

Mental math subtraction is a method of performing subtraction calculations in your head without using paper or a calculator.

Tags

CCSS.3.OA.D.8

2.

FLASHCARD QUESTION

Front

What does it mean to regroup in subtraction?

Back

Regrouping in subtraction means rearranging the numbers to make the subtraction easier, often by borrowing from the next highest place value.

Tags

CCSS.7.NS.A.1C

3.

FLASHCARD QUESTION

Front

What is the first step in subtracting 90 - 48 using mental math?

Back

Add 2 to 48 to make it easier to subtract.

4.

FLASHCARD QUESTION

Front

What do you do after subtracting 90 - 50 in the example of 90 - 48?

Back

You should add 2 to the result of 40.

Tags

CCSS.6.NS.B.3

5.

FLASHCARD QUESTION

Front

When subtracting 63 - 39, what should you add first?

Back

You should add 1 to 39.

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

6.

FLASHCARD QUESTION

Front

What is the result of 84 - 49 if you add 1 to 49 first?

Back

The result is 34, and then you should add 1 to 34.

Tags

CCSS.1.OA.A.1

7.

FLASHCARD QUESTION

Front

Do you need to regroup to subtract 72 - 47?

Back

Yes, you need to regroup.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

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