Question

Estimate the answer to the following problem by rounding to the nearest 10:


13 + 46 + 87 = ?

A: 130
B: 155
C: 160
D: 150

I personally think its 160, because look; 13 + 46 + 87 = 146. I rounded it, and I think it's 160.

Could anybody find out if it's correct or not? Thank you.

Answer 1

to the nearest 10
13---> 10
46 ---> 50
87 ---> 90

sum = 150

if you added them up like you did to get 146 , you have the actual answer, why bother estimating ?
Besides, 146 rounded to the nearest tens is 150, not 160

Answer 2

Yay, thank you Reiny. That helped me.