Mental subtraction worksheet
Work these questions out in your head and discuss with your group how you do them.
1.
300 - 10 =
6.
200 - 101 =
2.
90 - 18 =
7.
444 - 102 =
3.
35 - 6 =
8.
555 - 99 =
4.
92 - 58 =
9.
666 - 97 =
5.
100 - 42 =
10.
3681 - 600 =
11.
Lucy is saving up to buy a game which costs $33. So far she has saved $18. How much more money does she need?
12.
When I add 16 to a secret number, I get 82. What is the secret number?
13.
Nanna is 67 years old and Anna is 19 years old. How much older is Nanna?
14.
Our house is 38 years old. In how many years will it be 100 years old?
15.
I had $7.45 and then I spent $1.95. How much money did I have left?
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