Adding and Subtracting within 20

Hank draws 7 bugs. Justin draws 4 bugs.

How many bugs did they draw in all?

Which shows how to count onto solve

the problem?

• 7, 8, 9, 10, 11

• 4, 5, 6, 7

• 4, 5, 6, 7

• 4+7

Tags

CCSS.2.OA.A.1

10 + 5

Tags

CCSS.1.OA.C.6

CCSS.2.OA.B.2

Charlize has 7 fish. Darius has 1 more fish than Charlize. Which equations show how many fish in all? Choose all that apply.

• 7+1=8

• 7+7+1=15

• 7+7=14

• 7+8=15

Tags

CCSS.1.OA.A.1

Lee draws 8 flowers. Anthony draws 5 flowers. How many flowers did they draw in all?

Which shows how to count on to solve the problem?

• 8, 9, 10, 11, 12, 13

• 5, 6, 7, 8

• 8 + 5

• 5 + 8

Tags

CCSS.2.OA.A.1

Lucy has 8 rings. Cara has 1 more ring than Lucy. Which equations show how many rings in all?

Choose all that apply.

• 8 + 1 = 9

• 8 + 8 + 1 = 17

• 8 + 8 = 16

• 8 + 9 = 17

Tags

CCSS.1.OA.A.1

7 + 3 + 5

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Which have a sum of 15?

Choose all that apply.

• 10 + 5

• 9 + 7

• 8 + 8

• 6 + 9

Tags

CCSS.2.OA.A.1

Nicholas has 12 postcards. He sends 5 postcards to his friends.

Which addition fact helps you find how many postcards Nicholas has left?

• 7 + 7 = 14

• 8 + 5 = 13

• 5 + 7 = 12

• 5 + 5 = 10

Tags

CCSS.2.OA.A.1

13 - 4 = ______

Tags

CCSS.2.OA.A.1

Ian has some baseball cards.

He gives 6 baseball cards to his friend.

Now he has 7 baseball cards.

Which equation shows how many baseball cards Ian had at first?

• 7 – 6 = 1

• 6 + 7 = 13

• 6 + 6 = 12

• 7 + 7 = 14

Tags

CCSS.2.OA.C.3