Simple
Subtraction
Subtraction
20 - 8 =
20 - 8 = 12
27 -14 -------
no regrouping. 27 -14 ------- 13
First add 20 + 10. Then subtract 15.
20 + 10 = 30.
30 - 15 = 15.
There were 24 kids working in a classroom. The teacher called 13 of them away to read together. How many were left in the classroom?
24 - 13 = 11.
50 - 10 =
50 - 10 = 40
56 -29 -------
yes regroup. 56 -29 ------- 27
First add 5 + 10. Then subtract 6.
5 + 10 = 15
15 - 6 = 9
There were 65 red and blue balloons. If 17 of them were red, how many were blue?
65 - 17 = 48. There were 48 blue balloons.
19 - 10 =
19 - 10 = 9
57 - 14 -------
no regrouping. 57 - 14 = 43
First add 50 + 11. Then subtract 4.
50 + 11 = 61
61 - 4 = 57
There were 66 students at the assembly. Then, 23 got up and sang a song. How many students were left in the audience?
66 - 23 = 43. There were 43 students in the audience.
100 - 20 =
100 - 20 = 80
84 - 37 -------
yes regroup. 84 - 37 = 47
98 - 45 =
98 - 45 = 53
First add 98 + 1. Then subtract 90.
98 + 1 = 99
99 - 90 = 9.
There are 72 chickens in the coop. Only 49 of them laid eggs. How many chickens did NOT lay an egg?
72 - 49 ------ 23 There were 23 chickens that did not lay an egg.
60 - 30 =
60 - 30 = 30
79 - 62 ------
no regrouping. 79-62 = 17
79 - 27 -----
79 -27 ----- 52
First add 10 + 8. Then subtract 12.
10 + 8 = 18
18 - 12 = 6
Mr. Smith has $78 dollars. He spends $34 dollars on dinner. How many dollars does he have left?
$78 - $34 = $44. He has $44 left.