Addition

Math Vocabulary

100

What is a doubles fact?

Two numbers that are the same are added.

200

Give an example of a doubles fact.

1+1=2

2+2=4

3+3=6

4+4=8

5+5=10

6+6=12

7+7=14

8+8=16

9+9=18

10+10=20

300

3+4=7 

 

What are the parts? What is the whole? 

3 and 4 are the two parts (groups). 

7 is the whole. The two parts together make a whole.

400

3 + 8 = 11

What are the addends in this problem? 

3 and 8 are the addends because they are the two numbers being added. 

500

What is a sum?

The answer to an addition problem.

Making 10

100

6 + ______ = 10 

4

200

Pete has 5 red apples. He also has 3 bananas and 2 pears. How many pieces of fruit does Pete have in all?

3 + 2 = 5

5+ 5 = 10

10 is the sum

300

There are 9 frogs in a pond. 1 more frog join them. How many frogs are there in all?

1 + 9 = 10

400

4 + ________ = 10

 

2 + ________ = 10

6

8

500

Rita has 8 marbles. She finds 2 more marbles. How many marbles does Rita have in all? 

8 + 2 = 10

Adding 0-2

100

4+0=________

Explain your answer.

4

Zero added to any number is the same as the original number

200

10 + 1 = ___________

11

300

There are 2 red buttons and 9 blue buttons. How many buttons are there in all? 

2 + 9 = 11

400

______ + 8 = 8

Explain your answer.

0

500

Julia has 11 dolls. Then she made 2 more dolls. How many dolls does Julia have in all?

11 + 2 = 13

Doubles/Near Doubles

100

8 + _____= 16

8

200

_____+ 5 = 10

 

7 + _____ = 15

5

 

8

300

7 +_______=14 

8 + ______ = 17

7

9

400

Jeff bought 6 apples. Jim bought the same number of apples. How many apples did they buy in all?

6 + 6 =12

500

Is 8 +9 = 17 a doubles fact? Why or why not?

No. 8 and 9 are not the same number. In a doubles fact, both numbers being added are the same. This is a near doubles fact.

Word Problems

100

Tim picked 8 apples. Kate picked 2 more. How many apples are there in all?

8 +2= 10

200

Jose has 8 stars. Monica has the same amount of stars. How many stars do they have in all?

8 +8=16

300

Emily has 4 cats. Troy does not have any cats. How many cats do Emily and Troy have in all?

4 + 0 = 4

400

Ray has 8 green marbles and 4 blue marbles.  How many marble does Ray have in all?

8 + 4 = 12 

500

David has 8 chocolate bars. Daniel has the double of what David has. How many chocolate bars does Daniel have?

8+8=16