Addition within 100
ten more ten less
Counting
How Many?
What did they do wrong?
100

26 + 3 =

29

100

50 + 10 = 

60

100

what 3 numbers come after 10

11, 12, 13

100

2 tens and 8 ones

28 

100

30 + 11 = 40

30 + 10 = 40 

0 + 1 = 0

0 + 1 = 1 not 0

200

17 + 6 =

23

200

30 - 10 =

20

200

what 3 numbers come before 10 

9, 8, 7

200

4 ones and 3 tens 

34

200

45 + 4 = 85 

40+ 40 =80 

5 + 0 = 5 

they added 4 tens instead of 4 ones

300

62 + 22=

84

300

60 + 20 =

80

300

what 2 numbers come before 25 

24 and 23

300

50 + 10 + 5 

65

400

16 + 39 = 

55

400

40 + 30 = 

70

400

what 2 numbers come after 79

80 and 81

400

7 tens 11 ones

81

500

51 + 14 =

65

500

what is 20 less than 90

70

500

what number comes before 111

110

500

13 ones and 6 tens

73