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Double Trouble
Near Doubles (+/- 1)
Friends of Ten
Vocabulary
100

Counting by 10s, write your numbers from 0-50

0, 10, 20. 30. 40. 50

100

1+1

2

100

2+3

5

100

5+__=10

5

100

This is what we call the answer to an addition problem.

The sum.

200

Counting by 2s, write your numbers from 20-30

20, 22, 24, 26, 28, 30

200

4+4

8

200

3+4

7

200

3+__=10

7
200

The name for this symbol =

The equals sign.

300

Counting by 5s, write your numbers from 50-75

50, 55, 60, 65, 70, 75
300

7+7

14

300

5+4

9

300

6+__=10

4
300

What do you call it when you add a number to itself?

A doubles fact.

400

Counting by ones, what comes next?
97, __, __, __, 101

98, 99, 100

400

9+9

18

400

6+7

13

400

10+__=10

0

400

This is what we call the answer to a subtraction problem.

The difference.

500

Counting backward by 10s, write your numbers from 40-0

40, 30, 20, 10, 0

500

10+10

20

500

8+9

17

500

1+__=10

9
500

What is the name of your favorite math game?

Slides and Ladders, Bump, Spider Addition, Doubles Doubles, or ...?

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