Counting Back
Counting On (a)
Counting On (b)
Any Strategy
Any strategy
100

45 - 9

36

45 - 44, 43, 42, 41, 40, 39, 38, 37, 36

100

43 - 34

9

34 - 35, 36, 37, 38, 39, 40, 41, 42, 43

100

75 - 67

8

67 - 68, 69, 70, 71, 72, 73, 74, 75

100

13 - 8

5

10 - 5

100

10 little kittens sleep in the big basket.  3 are in the basket now.  How many more little kittens can fit?

7 kittens can fit in the basket.

200

67 - 2

65


67 - 66, 65

200

23 - 15

23

15 - 16, 17, 18, 19, 20, 21, 22, 23

200

102-97

4

97 - 98, 99, 100, 101

200

16 - 7

9

10 - 1

200

The black kitten had 12 fish. He ate 4 of them.  The brown kitten has 7 fish.  Do they have the same number of fish now?

The black kitten has 8 and the brown kitten has 7.  The black kitten has more fish.

300

89 - 6

83

89 - 88, 87, 86, 85, 84, 83

300

33 - 27

6

27 - 28, 29, 30, 31, 32, 33

300

120 - 113

8

113 - 114, 115, 116, 117, 118, 119, 120

300

15 - 6

9

10 - 4

300

18 students in one class have cats.  Only 7 students in another class have cats.  How many students in both classes don't have cats?

11 studnets don't have cats.

400

103 - 8

95

103 - 102, 101, 100, 99, 98, 97, 96, 95

400

55 - 45

10

45 - 46, 47, 48, 49, 50, 51, 52, 53, 54, 55

400

113 - 101

12

101 - 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113

400

13 - 7

6

10 - 4

400

10 people took their dogs for a walk in the park. If 3 of them went home, how many dogs were left in the park?

7 dogs were left in the park.

500

120 - 11

109

120 - 119, 118, 117, 116, 115, 114, 113, 112, 111, 110, 109

500

22 - 20

2

20 - 21, 22

500

343 - 336

7

336 - 337, 338, 339, 340, 341, 342, 343

500

18 - 9

9

10 - 1

500

6 penguins jumped into the cold, icy water.  Then, 4 more jumped in. Later, 3 more penguin friends joined them. What was the total number of penguins in the water?

13 penguins jumped into the cold water.

6 + 4 + 3