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CTET Paper I (Classes I to V) 23 Dec 2021 Solved Paper

Question : 32 of 150

Marks: +1, -0

0.54 × 0.01 × 0.4

Solution:

Concept:

Multiply decimals by counting total decimal places and shifting the decimal point.

Explanation:

First, multiply

0.54 \times 0.01 = 0.0054

Then multiply

0.0054 \times 0.4 = 0.00216

Alternatively, multiply whole numbers:

54 \times 1 \times 4 = 216

Count total decimal places:

0.54

has 2,

0.01

has 2,

0.4

has 1 → total 5 decimal places.

216

with 5 decimal places gives

0.00216

Answer:

Option C:

0.00216

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