Estimate the sum by rouding to the nearest ten.

Question

20+17+99+41

Answer 1

Kris' answer will give you the correct answer. Another way to solve this would be adding all the numbers together. Then seeing if the final number is closer to the higher ten number or the lower ten number. For example, if the final answer is 156, then this is closer to the higher ten number which is 160 than it is to the lower ten number which is 150. 

Answer 2

If you round each of the numbers to the nearest 10, you have 20 + 20 + 100 +40 =_____