SIMPLIFICATION: Solving questions having combination of addition and subtraction
While solving questions having a combination of addition and subtraction, first add all the numbers with positive signs, and then add all the numbers with negative sign. Finally subtract the negative sign number from the positive number.
E.g. : 5975 + 8542 – 9754 + 9210 – 4823first solve the numbers with positive sign -> 5975 + 8542 + 9210 = 23727 - (a)
Now add the numbers with negative sign -> 9754 + 4823 = 14577 - (b)
Finally subtract (b) from (a) -> 23727 - 14577 = 9150
Now try to solve these 10 questions as fast as possible (5-10min)
1. 10542 – 654 + 3355 – 4520 =?
(a) 5723 (b) 8732 (c) 9032 (d) 7958
2. 555+55-444+333-9 =?
(a) 500 (b) 485 (c) 490 (d) 505
3. 1000 + 100 + 10 – 999 – 9 =?
(a) 102 (b) 112 (c) 98 (d) 88
4. 5431 + 10500 – 4371 – 1357 =?
(a) 4242 (b) 4142 (c) 4192 (d) 4292
5. 5431 + 10500 – 4371 – 1357 =?
(a) 9203 (b) 10003 (c) 10203 (d) 11203
6. 543 + 676 – 455 – 321 =?
(a) 493 (b) 443 (c) 343 (d) 543
7. 100000 – 50000 + 60000 + 200000 – 20000 =?
(a) 290000 (b) 300000 (c) 310000 (d) 280000
8. 89 + 74 – 63 + 52 – 41 =?
(a) 99 (b) 101 (c) 111 (d) 109
9. 421 + 632 + 500 – 899 =?
(a) 654 (b) 645 (c) 564 (d) 456
10. 79 + 21 – 55 + 45 =?
(a) 90 (b) 95 (c) 105 (d) 85
ANSWERS
1 b 2 c 3 a 4 b 5 c
6 b 7 a 8 c 9 a 10 a
TIME TAKEN
Within 5min : EXCELLENT
5-10min : YOU CAN DO BETTER
More than 10 min : YOU NEED TO WORK HARD
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