53.7÷2.5÷0.4
0.35×101
3.7×4.8+0.37×52
x÷0.8=1.25
2x-0.6x=2.8
999×2.5+333×12.5
60%x+14=32.6
5(x-2.8)=140
0.81+1.19=
8×0.125
5.3×10+4.7×10=
12.5×4×8=
10÷0.4=
2.5×4÷2.5×4=