选择恰当的方法计算．16.1÷4.6-0.6+2.931.5×12.5×0.815.7×0.46-5.7×0.465.4÷〔0.5（3.52.6）〕99×46+465.6-0.71-0.29

Question

选择恰当的方法计算．

16.1÷4.6-0.6+2.9	31.5×12.5×0.8	15.7×0.46-5.7×0.46
5.4÷〔0.5（3.52.6）〕	99×46+46	5.6-0.71-0.29

Answer 1

（1）16.1÷4.6-0.6+2.9
=3.5-0.6+2.9
=2.9+2.9
=5.8

（2）31.5×12.5×0.8
=31.5×（12.5×0.8）
=31.5×10
=315

（3）15.7×0.46-5.7×0.46
=（15.7-5.7）×0.46
=10×0.46
=4.6

（4）5.4÷[0.5×（3.5-2.6）]
=5.4÷[0.5×0.9]
=5.4÷0.45
=12

（5）99×46+46
=（99+1）×46
=100×46
=4600

（6）5.6-0.71-0.29
=5.6-（0.71+0.29）
=5.6-1
=4.6