Question

Estimate 91 +94 by first rounding each number to the nearest ten.

Answer 1

about 180

Explanation:

(when rounding, numbers 0-4 "stay" meaning you'd round down. If the numbers are 5-9, you round up)

91 rounded to the nearest ten would be 90

94 rounded to the nearest ten would be 90 as well

So, 90 + 90 = 180

Technically though, 91+94 = 185. So rounding this to the nearest ten would be 190.

Do what you will :)

Answer 2

91 +94. 91 is rounded to 90 and 94 is rounded to 90.
90+90=180