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脱式计算，能简算的要简算．0.7×101-0.70.125×4.7×84280×7.8+572×784×6.32×2.512.5-1.68-2.32567÷20÷515.73-（2.17+0.73）-1.8312.5×2.5×0.8×4．
题目详情
脱式计算，能简算的要简算．
| 0.7×101-0.7 | 0.125×4.7×8 | 4280×7.8+572×78 | 4×6.32×2.5 |
| 12.5-1.68-2.32 | 567÷20÷5 | 15.73-（2.17+0.73）-1.83 | 12.5×2.5×0.8×4． |
▼优质解答
答案和解析
①0.7×101-0.7
=0.7×（101-1）
=0.7×100
=70
②0.125×4.7×8
=0.125×8×4.7
=1×4.7
=4.7
③4280×7.8+572×78
=428×78+572×78
=（428+572）×78
=1000×78
=78000
④4×6.32×2.5
=4×2.5×6.32
=10×6.32
=63.2
⑤12.5-1.68-2.32
=12.5-（1.68+2.32）
=12.5-4
=8.5
⑥567÷20÷5
=567÷（20×5）
=567÷100
=5.67
⑦15.73-（2.17+0.73）-1.83
=15.73-2.17-0.73-1.83
=（15.73-0.73）-（2.17+1.83）
=15-4
=11
⑧12.5×2.5×0.8×4
=（12.5×0.8）×（2.5×4）
=10×10
=100
=0.7×（101-1）
=0.7×100
=70
②0.125×4.7×8
=0.125×8×4.7
=1×4.7
=4.7
③4280×7.8+572×78
=428×78+572×78
=（428+572）×78
=1000×78
=78000
④4×6.32×2.5
=4×2.5×6.32
=10×6.32
=63.2
⑤12.5-1.68-2.32
=12.5-（1.68+2.32）
=12.5-4
=8.5
⑥567÷20÷5
=567÷（20×5）
=567÷100
=5.67
⑦15.73-（2.17+0.73）-1.83
=15.73-2.17-0.73-1.83
=（15.73-0.73）-（2.17+1.83）
=15-4
=11
⑧12.5×2.5×0.8×4
=（12.5×0.8）×（2.5×4）
=10×10
=100
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