计算下面各题,能简算的要简算.
①4.28-1.39-2.61 | ②7.2×0.3+0.3×0.8 | ③0.4×3.14×2.5 | ④9.4×[3.6÷(5.4÷0.9)] |
⑤840÷(0.23+0.37)÷7 | ⑥23.7╳1.25╳8 | ⑦12.5×102 | ⑧9.1+0.9╳(22-18.7) |
①4.28-1.39-2.61 | ②7.2×0.3+0.3×0.8 | ③0.4×3.14×2.5 | ④9.4×[3.6÷(5.4÷0.9)] |
⑤840÷(0.23+0.37)÷7 | ⑥23.7╳1.25╳8 | ⑦12.5×102 | ⑧9.1+0.9╳(22-18.7) |