Question

计算下面各题，能简便的要简便．5.6+0.82+4.4+0.18 70÷3.5+4.5×1.6  ...

计算下面各题，能简便的要简便．5.6+0.82+4.4+0.18 70÷3.5+4.5×1.6 0.25×0.73×4 7.6×0.8+0.2×7.6 7.75×〔20÷（3.24-3.04）〕 63.4÷2.5÷0.4．

Answer 1

（1）5.6+0.82+4.4+0.18
=5.6+4.4+（0.18+0.82）
=10+1
=11；

（2）70÷3.5+4.5×1.6
=20+7.2
=27.2；

（3）0.25×0.73×4
=0.25×4×0.73
=1×0.73
=0.73；

（4）7.6×0.8+0.2×7.6
=（0.8+0.2）×7.6
=1×7.6
=7.6；

（5）7.75×[20÷（3.24-3.04）]
=7.75×[20÷0.2]
=7.75×100
=775；

（6）63.4÷2.5÷0.4
=63.4÷（2.5×0.4）
=63.4÷1
=63.4．