LESSON 10.2 MENTAL MATH: TEN MORE THAN A NUMBER

Use mental math to solve the equation.

21 + 10 = ____

• A.31

• B.22

• C.33

• D.44

Use mental math to solve the equation.

17 + 10 = ____

• A.18

• B.27

• C.28

• D.107

Use mental math to solve the equation.

10 + 48 = _____

• A.38

• B.49

• C.58

• D.68

Rita collects 57 stickers.

Frank collects some stickers.

Rita and Frank have 67 stickers together.

How many stickers does Frank have?

• A.5

• B.10

• C.15

• D.20

Enter sum to match it to the correct pair of addends.

77+10=