3
4
5 & 10
What am I counting by?
Equal Groups x
100

3, 6, 9, 12, 15, ____

18

100

4, 8, 12, 16, ______

20

100

5, 10, 15, ______, _______

20, 25

100

18, 20, 22, 24, 26...

twos

100
2 groups of 5 equals...

10

200

103, 106, 109, _____

112

200

54, 58, 62, 66, _____

70

200

10, 20, 30, 40, ______

50

200

65, 70, 75, 80, 85

fives

200

3 groups of 3 equals...

9
300

259, 262, 265, 268, ____

271

300

224, 228, _____, 236, 240, _____

232, 244

300

330, 340, ______, 360, ______

350, 370

300

50, 75, 100, 125, 150

twenty fives
300

4 groups of 4 equals

16

400

426, 429, ____, 435, 438, _____

432 & 441

400

314, 318, _____, 326, ______

322 and 330

400

77, 87, ______, 107, _______

97, 117

400

875, 900, 925, 950, 975

twenty fives

400

3 groups of 7 equals...

21

500

Start at 947 and count by 3 five times.

950, 953, 956, 959, 962

500

Start at 400 and count by 4 five times

404, 408, 412, 416, 420

500

333, 338, 343, ______, _______

348, 353

500

888, 892, 896, 900, 904

fours

500

6 groups of 4 equals...

24

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