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kompoz [17]
3 years ago
13

What is the product of -4 and 8.1? a) -32.4 b) -12.1 c)12.1 b) 32.4

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
8 0

Option A

<u>Answer: </u>

The product of -4 and 8.1 is -32.4

<u>Solution: </u>

When we multiply a negative number with a positive number we get the resultant product as a negative number.

Here we have to multiply - 4 which is a negative number and 8.1 which is a positive number.

To simplify the multiplication calculation we can write 8.1 as 8+0.1 and then multiply 4 with both 8 and 0.1

-4 \times 8.1 = -4 \times (8+0.1)

⇒  -4 \times 8.1 = -4 \times 8 – 4 \times 0.1   [Multiplying 4 with 8 and 0.1]

⇒  -4 \times 8.1= -32 - 0.4

⇒  -4 \times 8.1= - 32.4

Thus the product of -4 and 8.1 is -32.4

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