Page 26 - Arithmetic

Explanation:
1574
1. 4, 12,8, 5
Take the LCM of all the numbers so that comparing the number is easy. 1= 30; 5 = 50;7=105;4= 96
4 12012 1208 1205 120
In descending order, the numbers are: 105 > 96 > 50 > 30 120 120 120 120
or 7 > 4 > 5 > 1 8 5 12 4
77
2. 11and8
Convert the fractions to decimals
77
. 11 = 0.636; 8 = 0.875
5 =0.83;3 =0.75;8 =0.88;4 =0.8;6 =0.85 64957
8 doesn’t lie in between 7 and 7 9 118
3. 0.005 × 0.06
Multiply 6 and 5 and put 5 zeros to the left of the product 5 × 6 = 30
Five zeros to the left of 30 = 0.0003
4. You will place 8 zeros.
5. In 1 meter he can cut 6 pieces.
In 67.5 meters, he can cut = 6 × 67.5 = 405
6. Let’s assume that rice will cost 30 cents more than pulses in year x. (1.75 + 0.30x) – (2.65 + 0.10x) = 0.30
0.20x = 0.30 + 0.90
0.2x = 1.2
x= 6
After 6 years, i.e. in 2016, rice will cost 30 cents more than pulses.
Page 25 of 55
Arithmetic Concept