4.2+2.01=
0.3×0.4=
1-0.08=
2×2.5×3=
0.39×0.1=
12÷0.5=
7.5÷1.5=
7.6×0.5÷76×0.5=
0.819÷1.3÷0.7 0.84÷0.6+0.84÷0.4
40-(4.3×2+0.96÷0.4) 1÷[(1.75-1.5)×0.4]