Show:
Counting
Addition
Subtraction
Doubles
Friends of 10
100

Start at 10 and count backwards to 0

10, 9 , 8, 7, 6, 5, 4, 3, 2, 1, 0

100

8+4

12

100

5-3

2

100

1+1

2

100

6+__ = 10

4

200

Skip count by 10s to 100. 

10, 20, 30, 40, 50, 60, 70, 80, 90, 100

200

6+0

6

200

10-5

5

200

3+3

6

200

1+__ = 10

9

300

Skip count by 5s to 50.

5, 10, 15, 20, 25, 30, 35, 40, 45, 50

300

15+3

18
300

18-6

12

300

10+10

20

300

5+__ = 10

5

400
Count by 1s from 75 to 85

75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85

400

30+20

50

400

40-10

30

400

8+8

16

400

3+ __ = 10

7

500

Count by 2s to 20. 

2, 4, 6, 8, 10, 12, 14, 16, 18, 20

500

70+22

92
500

63-21

42

500

9+9

18

500

2+__ = 10

8