Estimate and then calculate. 2.34 × 6.9

Question

asked Jul 18, 2023 188k views

1 Answer

Sabaoon Bedar · Answer 1 · 2023-07-22T13:16:49+0000

Rounding the first number, you have

$2.34\approx2.3\approx2$

because the number is rounded down if the digit to the right is less than 5.

Rounding the second number, you have

$6.9\approx7$

because the number is rounded up if the digit to the right is greater than 5.

Therefore, estimating and calculating, you have

$2.34\cdot6.9\approx2\cdot7=14$