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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