Which of the following is the correct solution to 17-5-422-5 -Solve by estimation-

First we round 17.5 to nearest unit As tenth place digit of the number is 5 so, 17.5≈18 Similarly, 2.5≈3 17.5×422.5 = 18×423 = 6×42 = 252 nbsp;By looking ...

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Standard VI

Mathematics

Estimating sums involving Product and Division of Decimal Numbers

Which of the ...

Question

Which of the following is the correct solution to $\frac{17.5 \times 42}{2.5}$ ?
Solve by estimation.

294

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504

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384

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Solution

The correct option is A 294
First we round $17.5$ to nearest unit
As tenth place digit of the number is 5 so, $17.5 \approx 18$

Similarly, $2.5 \approx 3$

$\frac{17.5 \times 42}{2.5} = \frac{18 \times 42}{3} = 6 \times 42 = 252$

By looking at the given choices, we see that 294 is closest to 252, therefore, it must be the right answer.

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Which of the following is the correct solution to 17.5×422.5 ? Solve by estimation.

The correct option is A 294First we round 17.5 to nearest unit As tenth place digit of the number is 5 so, 17.5≈18 Similarly, 2.5≈3 17.5×422.5=18×423=6×42=252 By looking at the given choices, we see that 294 is closest to 252, therefore, it must be the right answer.

Which of the following is the correct solution to $\frac{17.5 \times 42}{2.5}$ ?
Solve by estimation.