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Numbers up to 20

Subtraction

Subtract to 20

(1) Subtract the numbers

10	-	9	= _____
10	-	3	= _____
16	-	2	= _____
17	-	8	= _____
12	-	8	= _____

14	-	9	= _____
16	-	7	= _____
20	-	2	= _____
13	-	3	= _____
18	-	2	= _____

19	-	5	= _____
15	-	7	= _____
16	-	8	= _____
13	-	9	= _____
17	-	5	= _____

(2) Subtract the numbers and check using addition

12	-	9	= ___ because 3 + 9 = _______
16	-	2	= ___ because = _____________
10	-	7	= ___ because = _____________
13	-	3	= ___ because = _____________
16	-	8	= ___ because = _____________

14	-	9	= ___ because = _____________
10	-	2	= ___ because = _____________
20	-	2	= ___ because = _____________
17	-	3	= ___ because = _____________
18	-	8	= ___ because = _____________

(3) Calculate

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10 + 5 = __
15 - 5 = __

10 + 9 = __
19 - 9 = __

10 + 3 = __
13 - 3 = __

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10 + 6 = __
16 - 6 = __

10 + 8 = __
18 - 8 = __

10 + 4 = __
14 - 4 = __

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