Subtraction Mental Math

Front

What is subtraction?

Back

Subtraction is taking away a number from another number. It shows how much is left after some is taken away.

Tags

CCSS.2.OA.A.1

Front

What does the minus sign (-) mean?

Back

The minus sign means to subtract or take away.

Tags

CCSS.7.NS.A.1C

Front

What is the result of 80 - 30?

Back

50

Tags

CCSS.1.NBT.C.5

Front

What is the result of 60 - 40?

Back

20

Tags

CCSS.1.NBT.C.5

Front

What is the result of 40 - 10?

Back

30

Tags

CCSS.1.NBT.C.5

Front

What is the result of 90 - 20?

Back

70

Tags

CCSS.1.NBT.C.5

Front

What is the result of 50 - 40?

Back

10

Tags

CCSS.1.NBT.C.5

Front

If you have 10 apples and you give away 3, how many do you have left?

Back

7 apples.

Tags

CCSS.2.OA.A.1

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals. It helps us visualize addition and subtraction.

Tags

CCSS.2.MD.B.6

Front

How can you check your subtraction?

Back

You can check your subtraction by adding the answer to the number you subtracted.

Tags

CCSS.1.OA.A.1