chepelashka1 1) 802-70:4*3=802-17.5*3=802-52.5=749.5
2)667+(474-426)*2=667+48*2=667+96=763
3)3*280-(861-599)=3*280-262=840-262=578
4)942-(115+315):2=942-430:2=942-215=727
5)360:9+687=40+687=727
6)100+(408-149)=100+259=359
7)(240+500)-17:4=740-17:4=740-4.25=735.75
8)300-(517-246)=300-271=29
9)(850-264)+48:2=586+24=610
10)147-57+56=90+56=146