Question

When rounding to estimate this sum, what do you do first?

389+190=

A. Add the digits in the hundreds place
B. round the addition problems 400+200
C. round the addition problems 300+100

Answer 1

B

Explanation:

this is because it would be more accurate than a and b

a would end up as 400

b would end up as 600

c would end up as 400

the actual answer is 579

it is closest to B