Question

Which is the best estimate of 7 - 132?
a) 90
b) 2
c) 12
d) 24

Answer 1

To estimate 7 - 132, we round 132 to 130 and subtract from 7 to get -123. The closest positive estimate to -123 is 24, disregarding the negative sign.

Step-by-step explanation:

The question asks for the best estimate of the difference between 7 and 132. To solve this, we can round the numbers to the nearest ten or to a number that makes calculation easier. Rounding 132 down to 130 makes it simple to subtract from 7:

• 132 rounds down to 130.
• Subtract 130 from 7 to get -123.

Since 90, 2, 12, and 24 are the options given, and none are negative, we need to find the closest positive estimate. Option (d) 24 is the closest to -123, ignoring the sign.