Lesson 3 Addition and Subtraction With Unknown Partners

6 +___ = 8

• 4

• 1

• 2

• 3

Tags

CCSS.1.OA.A.1

9 - ___ = 3

• 6

• 12

• 5

• 7

Tags

CCSS.1.OA.D.8

Solve this story problem with addition AND subtraction. Use a math mountain. Draw your math mountain on your white board. Write the addition and subtraction sentences here.

There are 7 crayons in the box. Some of the crayons are broken, but 3 are not. How many crayons are broken?

Tags

CCSS.1.OA.A.1

Write a number sentence to solve this story problem.

Lila has 10 books. She gives 4 away. How many books does Lila have left?

Tags

CCSS.2.OA.A.1

Which number sentences can we use to solve this story problem? Check all that work.

There are 3 fish in the bowl. You add 2 more fish to the bowl. How many fish are in the bowl in all?

• 3 + 2

• 2 + 3

• 5 + 3

• 5 + 2

Tags

CCSS.2.OA.C.3