Addition
Skip Count
Subtraction
Tie Breaker
100

10+5

10+5=15

100

Count by 2's to 12

2, 4, 6, 8, 10, 12.

100

15-5

15-5=10

200

12+4

12+4=16

200

Count by 10's to 90 

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

200

16-4

16-4=12

300

11+7

11+7=18

300

Count by 5's to 50. 

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

300

17-4

17-4=13

400

15+4

15+4=19

400

Count by 10's to 120

10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120

400

20-6

20-6=14

500

13+7

13+7=20

500

Count by 5's to 100

5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100

500

20-12

20-12=8
500

There are 15 fish. 7 have big fins. How many fish have small fins? 

8 fish have small fins.

M
e
n
u