Which is the best estimate of the sum of 356 and 71, if each number is rounded to the nearest ten? a) 500 b)430c)420d)400

Hey there!

So 356 + 71 = 427

and if you round it to the nearest tenth then you're rounding the 27 up. 

This means that your answer will be 430.

Here's a chart to help remind you which numbers to round! :-)

Hope this helps!

Idon’t know what the answer is i wish i could

The decimal expansion would be .27 repeated