Practice the tricky questions given in the worksheet on mental math subtraction. Try to subtract by using the trick and skills so that the benefits can be enjoyed by both kids and adults. Anyone can learn mental math skills and tricks which can be easily learned by performing mentally on a regular basis.
1. Subtract the following numbers mentally by using addition method:
(i) 93 – 67
(ii) 84 – 31
(iii) 52 – 14
(iv) 95 – 48
(v) 98 – 52
(vi) 63 – 26
2. Subtract the
following numbers mentally by counting backward method:
(i) 19 – 4
(ii) 18 – 7
(iii) 17 – 6
(iv) 20 – 3
(v) 53 – 5
(vi) 43 – 8
3. Find the difference of the following numbers using the tricky and skilled method:
(i) 74 – 47
(ii) 57 – 28
(iii) 57 – 25
(iv) 73 – 27 = 73 – (20 + 7) = (73 – 20) – 7 = 53 – 7 = ?
(v) 68 – 36 = 68 – (?) = ?
(vi) 91 – 62 = 91 – (60 + 2) = ?
(vii) 87 – 54
(viii) 67 – 28 = 67 – 30 + 2 = 37 + 2 = ?
(ix) 164 – 41 = (164 – 1) – 40 = ?
(x) 57 – 29
(xi) 81 – 15
4. To find the difference between two numbers, we always subtract the __________ number from the __________ number.
5. 6,542 - 2,260 = 4,282; Here, minuend and subtrahend are __________ and __________ respectively.
6. 9,640 - 9,640 = __________
7. What number should be subtracted from the smallest 4-digit number to get the largest 3-digit number?
8. Find the difference of the place values of 4s in 4,4029.
9. 4,892 - 1,000 = __________
10. The difference between the smallest 3-digit number and the largest 2-digit number is __________
11. 6,298 -3,000 = __________
12. 2,500 - 500 + 3,000 = __________
13. What should be subtracted from 5 thousands to get 6 hundreds?
14. What are the two numbers which give 100 if added and also give 100 when subtracted?
Answers for the worksheet on mental math subtraction are given below to check whether you get the exact answers when you use the tricky strategies to subtract mentally.
Answers:
1. (i) 26
(ii) 53
(iii) 38
(iv) 47
(v) 46
(vi) 37
2. (i) 15
(ii) 11
(iii) 11
(iv) 17
(v) 48
(vi) 35
3. (i) 27
(ii) 29
(iii) 32
(iv) 46
(v) 32
(vi) 29
(vii) 33
(viii) 39
(ix) 123
(x) 28
(xi) 66
4. smaller; greater
5. 6,542; 2,260
6. 0
7. 1
8. 36,000
9. 3,892
10. 1
11. 3,298
12. 5,000
13. 4,400
14. 0 and 100
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