100+ Decimal Fraction Questions with Answers for SSC Exams - 1
Question: 1
The place value of 9 in 0.06945 is
(A) $${9}/{10}$$
(B) $${9}/{100}$$
(C) $${9}/{1000}$$
(D) 9
Ans: C
9 is at thousandths place in 0.06945.
So, place value of 9 = $${9}/{1000}$$.
Question: 2
0.000006723 when expressed in scientific notation, is
(A) 6723 × 10-5
(B) 67.23 × 107
(C) 6.723 × 10-6
(D) 6.723 × 10-7
Ans: C
0.000006723 = $${0.000006723 × 10^6} / {10^6}$$ = $${6.723} / {10^6}$$ = 6.723 × 10-6.
Question: 3
32.4 × 11.5 × 8.5 = ?
(A) 3149.5
(B) 3129.1
(C) 3162.5
(D) 3167.1
Ans: D
324 × 115 × 85 = 3176100.
Sum of decimal places = 3.
∴ 32.4 × 11.5 × 8.5 = 3167.1
Question: 4
345 + 25 × 0.80 - 111 = ?
(A) 254
(B) 324
(C) 600
(D) 666
Ans: A
Given expression = 345 + 20 – 111 = 365 – 111 = 254.
Question: 5
A maximum of how many pieces of 12.6 cm can be cut from a 857 cm long rod?
(A) 58
(B) 62
(C) 68
(D) 70
Ans: C
Number of pieces = $${857}/{12.6}$$ = $${8570}/{126}$$ = 68.01 = 68.
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