﹣4.8+3.9=
17﹣18=
1÷0.125=
﹣0.12×25=
12.5×(﹣0.8)=
﹣4.2÷(﹣0.7)=
0÷(﹣4.5)=
﹣4.6﹣(﹣4.6)=
2.5﹣2.5÷0.5=
0.8+0.6×4=