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Numbers up to 20

Subtraction

Subtract to 20

(1) Subtract the numbers

18	-	4	= _____
16	-	10	= _____
18	-	10	= _____
18	-	5	= _____
10	-	3	= _____

14	-	1	= _____
19	-	5	= _____
10	-	8	= _____
12	-	3	= _____
15	-	8	= _____

14	-	4	= _____
19	-	1	= _____
17	-	1	= _____
10	-	7	= _____
11	-	2	= _____

(2) Subtract the numbers and check using addition

10	-	4	= ___ because 6 + 4 = _______
19	-	10	= ___ because = _____________
18	-	5	= ___ because = _____________
12	-	10	= ___ because = _____________
18	-	5	= ___ because = _____________

14	-	1	= ___ because = _____________
16	-	8	= ___ because = _____________
10	-	8	= ___ because = _____________
18	-	3	= ___ because = _____________
15	-	3	= ___ because = _____________

(3) Calculate

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10 + 6 = __
16 - 6 = __

10 + 10 = __
20 - 10 = __

10 + 4 = __
14 - 4 = __

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10 + 7 = __
17 - 7 = __

10 + 9 = __
19 - 9 = __

10 + 5 = __
15 - 5 = __

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