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Multiplication of Decimal Numbers

4.5 × 4=

Question

4.5 $\times$ 4 =

A

1.8

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B

18

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C

180

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Solution

The correct option is B 18
45 $\times$ 4 = 180
The number of digits after the decimal point in the answer is the sum of the number of decimal digits(number of digits after the decimal point in the factors).
Hence 4.5 $\times$ 4 = 18.0

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