Question

Which of the following expressions could be used to estimate the difference between -12.34 and -4.8?

-12 - 5
-12 + 5
-12 - 4
-12 + 4

Answer 1

-12-(-5)

=-12+5

The ans is -12+5

Explanation:

Answer 2

-12+5

for -12.34,we take it as -12
for -4.8,we take it as -5

to measure the difference,here's what you need to do

-12-(-5)
=-12+5
thus the ans is -12+5

hope it helps