Question

use rounding or compatible numbers to estimate sum of 87 +34

Answer 1

if u round 87 its 90 and when you round 34 it is 30 then you add 90 and 30 and you get 120...
i hope this helped....
:) .........:)

Answer 2

87 rounded is 90 and 34 rounded is 30 so 90+30=120