Topic 4

Fast Facts

100

10 - 5 = ?

5

200

13 - 6 = ?

7

300

15 - 6 = ?

9

400

18 - 4 = ?

14

500

19 - 8 = ?

11

Think Addition

100

Which addition fact will help you solve 16 - 8?

8 + 8 = 16

200

Which addition facts will help you solve 12 -3?

Write two. 

3 + 9 = 12

9 + 3 = 12

300

Which addition facts will help you solve 14 - 9?

Write two. 

9 + 5 = 14

5 + 9 =14

400

Julia solves a subtraction problem using 7 + 8 = 15. What two subtraction problems could she have solved?

15 - 8 = 7

15 - 7 = 8

500

Write an addition and subtraction equation to solve the problem.

Joe picks some flowers on Monday. On Tuesday, he picks 9 flowers. In all, he picked 18 flowers. How many did Joe pick on Monday.

9 + 9 = 18

18 - 9 = 9

Fact Families

100

Which fact is missing from this family?

5 + 6 = 11

6 + 5 = 11

11 - 5 = 6

11 - 6 = 5

200

Finish this fact family.

15 - 6 = 9

15 - 9 = 6

6 + 9 = 15

9 + 6 =15

300

Create a fact family using these numbers...

8, 6, 14

8 + 6 = 14

6 + 8 = 14

14 - 8 = 6

14 - 6 =8

400

Solve the problem and write the missing equations from this fact family?

8 + 9 = ?

8 + 9 = 17

9 + 8 = 17

17 - 9 = 8

17 - 8 = 9

500

Create a fact family based on these objects. 

* * * * $ $ $ $ $

4 + 5 = 9

5 + 4 = 9

9 - 5 = 4

9 - 4 = 5

Strategies

100

Use a number line to count on or back to solve 14 - 5.

14 - 5 = 9

200

Which strategy could you not use to solve 9 - 5?

Make a ten

300

Make a ten to solve 11 - 3.

11 - ____ = 10

10 - ____ = ___

11 -   3    = ___

11 - 1 = 10

10 - 2 = 8

11 - 3 = 8

400

Make a ten to solve 16 - 7. 

16 - ____ = 10

10 - ____ = ___

16 -   7    = ___

16 - 6 = 10

10 - 1 = 9

16 - 7 = 9

500

Make a ten to solve 13 - 8. 

13 - ____ = 10

10 - ____ = ___

13 -   8    = ___

13 - 3 = 10

10 - 5 = 5

13 - 8 = 5

Word Problems

100

Ellie has 10 buttons. She loses 3 buttons. How many does she have left?

7 buttons. 

200

Fred has 12 donuts. He eats 4 donuts. How many does he have left?

Fred has 8 donuts left. 

300

Larry has some yellow markers. He has 7 blue markers. Larry has 14 markers in all. How many are yellow?

7 are yellow.

400

Create a number story for 13 - 4. And solve. 

Example:

Henry has 13 cupcakes. Zach has 4 cupcakes. How many more cupcakes does Henry have?

Henry has 9 more cupcakes.

500

Write a number story for 17 - 7. And solve the problem. 

Example. 

Mia had 17 stickers. She gave 7 to Lily. How many did she have left?

17 - 7 = 10