Show:
True or False
Quick Subtraction
Count on or back
100

52 - 26 = 53 - 26

FALSE

100

8 - 2 =

6

100

72 - 68

COUNT ON

200
88 - 78 = 10

TRUE

200
15 - 10 =

5

200

53 - 20

COUNT BACK

300

16 - 6 = 15 - 5

TRUE

300

20 - 5 =

15

300

1000 - 900

COUNT ON