1.-3(72-138)=198
2.(31-12)×(32-62)=-570
3.(39-57)÷(27-18)=-2
4.29/30-5/18×6/25=9/10
5.-1/3×5/5-5/6×33/25=-13/30
6.2,26-0,8×2,58=0,196
7.(3,7-5,9)÷0,4=-5,5
1.-3(72-138)=198
2.(31-12)×(32-62)=-570
3.(39-57)÷(27-18)=-2
4.29/30-5/18×6/25=9/10
5.-1/3×5/5-5/6×33/25=-13/30
6.2,26-0,8×2,58=0,196
7.(3,7-5,9)÷0,4=-5,5