Addition and Subtraction to 20

Ali collected 15 shells on Saturday and lost 4 on Sunday. How many shells does she have now?

• 5

• 12

• 11

• 15

Sally has 5 donuts and her brother has 12 donuts. How many donuts do they have in all?

• 5

• 17

• 6

• 18

Mandy has 12 cupcakes. She gives 4 cupcakes to her mom. How many does she have left?

• 12 + 4 = 16

• 12 + 4 = 20

• 12 – 4 = 12

• 12 – 4 = 8

Which addition sentence can be used to find 14 – 7? Choose the letter choice with the addends that help you to solve.

14 = ____ + ____

• 7 + 7

• 8 + 8

• 9 + 7

Tom has 13 postcards. His brother gives him 5 more. How many postcards does he have in all?

• 13 – 5 = 8

• 13 – 5 = 9

• 13 + 5 = 18

• 13 + 5 = 20

What number is missing from the equation below?

18 = ____ + 9  18 - ____ = 9

• 18

• 9

• 8

• 7

Which addition equation can help you determine 15 – 5 = ?

• 6 + 15 = 21

• 15 + 3 = 18

• 11 + 3 = 14

• 5 + 10 = 15

What is 10 + 8 = ?

• 19

• 18

• 20

• 10

What is 19 – 7 = ?

• 15

• 11

• 19

• 12

Mindy has 5 photos. She gets some more photos. She has 13 photos in all. How many more photos did she get?

• 8

• 19

• 18

• 5