Primul exercitiu:
562:2=281+(816:4)=281+204=485
485×3=1466
2. 7 masinute....175 lei
1 masinuta....175:7=25
==> 5 masinute...25×5=125 lei
7. 9 cutii....216 bomboane
O cutie...216:9=24
==>6 cutii = 24×6=144 bomboane
8.Notam
a=570
b=570:3=190
suma = 570+190=760