Question

Which rounding strategy will result in the most reasonable estimate for the expression −148+297+−546+151+48?

−150+300+−550+150+50=−200

−100+200+−500+100+0=−300

−100+200+−500+100+0=−900

−150+300+−550+150+50=−1200

Answer 1

The first one and round to the nearest tens place

Answer 2

-150 + 300 - 550 + 150 +50 = -200

Explanation:

I rounded to the nearest tens place for each number.