4.21×101-4.21
0.125×2.5×8.8
0.47÷0.25÷0.4
2.4×（6.4+3.6÷0.5）
7.6×1.9﹣96.2÷7.4
2.54×10.1﹣0.254
2.5×7.9×0.4
3.79÷0.125÷0.8
0.25×58.5×40
84.5+84.5×99
48÷0.8÷0.125
15.856+3.84+1.16﹣14.856
3.14×9+3.14×2﹣3.14×10
72.8÷5.6+14.9 1.35×2.5+2.65×2.5 1.4÷0.8÷12.5
8.7÷0.2÷0.5 0.5×16.3+0.5+3.7×0.5
8.97÷0.25÷4 13.2﹣3.2÷0.8
0.8×8.5÷0.2 4.05×101﹣4.05