Adding/Subtracting Fluently

Vocabulary

100

Take one part away from a whole.

What is subtracting?

200

Join two or more parts together.

What is adding?

300

Two numbers you add together in an addition sentence.

What are addends?

400

When you subtract from a number, you ______  ______.  When you add to a number, you ______ _____.

What is count back and count on?

500

Addition and Subtraction facts that use the same three numbers.

What is Fact Families or Related Facts?

Fact Family

100

Complete the Fact Family: 9+5=____

What is 14?

200

Complete the Fact Family: 14-5=____

What is 9?

300

Complete the Fact Family: 

9+___=14

___+9=14

What is 5?

400

Complete the Fact Family:

12+5=17

5+12=17

What is: 

17-5=12

17-12=5

500

Complete the Fact Family:

9, 6, 15

What is:

6+9=15

9+6=15

15-6=9

15-9=6

Add

100

16+4=_____

What's your strategy.

What is 20?

Make a Ten, Number Line, Count On

200

21+____=41

What's your strategy?

What is 20?

Looked at the tens place value, skipped count

300

12+8+10=_____

How did you solve?

What is 30?

12+8, then +10

12+10, then +8

8+10, then +12 

400

14+___+12=32

What is 6?

500

24+___+___=40

Answers will vary.

Subtract

100

21-7=___

What was your strategy?

What is 4?

Count back, Number Line

200

36-____=31

What was your strategy?

What is 5?

Count Back, Number Line

300

25-10-6=____

What was your strategy?

What is 9?

Answers will vary.

400

30-___-10=10

What was your strategy?

What is 10?

Answers will vary.

500

78-53=____

What was your strategy?

What is 25?

Answers will vary.

Word Problem

100

George had 3 mechanical pencils.  He bought a pack of 5 from the school store.  How many does he have now? 

What is 8 mechanical pencils?

200

Ritisha and Ishanni went to the movies.  Ritisha bought 3 snacks and a drink.  The girls had 10 snacks in all.  How many snacks did Ishanni buy?

What is 7 snacks?

300

Abhy brought 15 cookies to school.  He gave Sohan 3 cookies and Adam 4 cookies.  How many cookies does he have left?

What is 8 cookies?

400

Haruno and Genevieve went to the store for school supplies.  Their total amount spend was $24.  What double fact can you use to find how much each spent?

12+12=24

500

There are 11 boys and 11 girls in the class.  3 boys are absent and 2 girls are absent.  One of those boys came in as tardy.  How many students are absent?  How many are present?

What is 4 absent?  What is 18 present?