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Numbers up to 20

Subtraction

Subtract to 20

(1) Subtract the numbers

16	-	9	= _____
18	-	3	= _____
10	-	10	= _____
20	-	7	= _____
15	-	1	= _____

14	-	10	= _____
15	-	2	= _____
15	-	4	= _____
10	-	9	= _____
16	-	6	= _____

17	-	1	= _____
13	-	9	= _____
20	-	10	= _____
15	-	6	= _____
14	-	2	= _____

(2) Subtract the numbers and check using addition

15	-	9	= ___ because 6 + 9 = _______
15	-	10	= ___ because = _____________
16	-	2	= ___ because = _____________
10	-	3	= ___ because = _____________
10	-	7	= ___ because = _____________

14	-	10	= ___ because = _____________
18	-	4	= ___ because = _____________
15	-	6	= ___ because = _____________
20	-	9	= ___ because = _____________
16	-	1	= ___ because = _____________

(3) Calculate

10 + 3 = __
13 - 3 = __

10 + 7 = __
17 - 7 = __

10 + 1 = __
11 - 1 = __

10 + 4 = __
14 - 4 = __

10 + 6 = __
16 - 6 = __

10 + 2 = __
12 - 2 = __