Decimal Fraction problems
- 1. 51.3 + 7.078 +1.38 + 0.9 =?
Options- A. 61.668
- B. 59.238
- C. 60.658
- D. None of these Discuss
Correct Answer: 60.658
Explanation:
51.300 + 7.078 + 1.380 + 0.900 = 60.658
- 2. The product of 3.5413 x 2.1 is
Options- A. 7.44673
- B. 7.43673
- C. 7.53673
- D. None of these Discuss
Correct Answer: 7.43673
Explanation:
For the product of 3.5413 x 2.1
Consider 35413 x 21 = 743673
Total decimal places = 4 + 1
? 3.5413 x 2.1=7.43673
- 3. [( 3.242 x 14 ) / 100] =?
Options- A. 0.045388
- B. 4.5388
- C. 453.88
- D. None of these Discuss
Correct Answer: 0.045388
Explanation:
Multiplying 3.242 x 14=4.5388
Now divide 4.5388 by 100
So, 4.5388 ÷ 100= 0.045388
? Shift the decimal two places to the left as 100
- 4. 9.724 ÷ 100 =?
Options- A. 972.4
- B. 9.724
- C. 0.09724
- D. None of these Discuss
Correct Answer: 0.09724
Explanation:
9.724 ÷ 100 = 0.09724
Shift decimal two palaces to the left. i.e 100
- 5. 5 x 0.25 x 6.301 x 0.00394=?
Options- A. 0.0310324220
- B. 0.0310324210
- C. 0.0310324250
- D. None of these Discuss
Correct Answer: 0.0310324250
Explanation:
Here 5 x 25 x 6301 x 394=310324250
Total decimal places = (2+3+5) = 10
? 5 x 0.25 x 6.301 x 0.00394 = 0.0310324250
- 6. 0.8 x? =0.0004
Options- A. .0005
- B. .005
- C. .5
- D. .00005 Discuss
Correct Answer: .0005
Explanation:
Let 0.8y = 0.0004
Then,y = 0.0004 / 0.8
= 0.004 / 8
= .0005
- 7. 0.9 x 0.008=?
Options- A. 0.072
- B. 0.0072
- C. 0.00072
- D. .72 Discuss
Correct Answer: 0.00072
Explanation:
? 9 x 8=72
? 0.09 x 0.008 = 0.00072 (Five place of decimal )
- 8. Solve the following:
? % of 10.8 =32.4
Options- A. 3
- B. 30
- C. 300
- D. 0.3 Discuss
Correct Answer: 300
Explanation:
Let k % of 10.8=32.4
⇒ (k x 10.8) / 100 = 32.4
⇒ k = (32.4 x 100 )/10.8
= 300
- 9. Solve the following:
? / .0025 = 800
Options- A. .2
- B. .02
- C. 2000
- D. 2 Discuss
Correct Answer: 2
Explanation:
Let k / .0025=800
Then, k = 800 x .0025
= ( 800 x 25 ) / 10000
= 2
- 10. Solve the following:
0.001 /? = 0.01
Options- A. 10
- B. .1
- C. .01
- D. .001 Discuss
Correct Answer: .1
Explanation:
Let 0.001 / x = 0.01
Then , x = 0.001 / 0.01
= 0.001 / 0.010
= 1 / 10
= 0.1
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