1)20.5×(0.032÷0.08)
=20.5×(3.2÷8)
=8++0.2
=8.2
=(7/12*4/5-2/5)÷7/10
=(7/15-2/5)÷7/10
=1/15×10/7
六年级下册递等式计算简算希望能解答下
1)20.5×(0.032÷0.08)
=20.5×(3.2÷8)
=8++0.2
=8.2
=(7/12*4/5-2/5)÷7/10
=(7/15-2/5)÷7/10
=1/15×10/7
答案是8.2
六年级下册递等式计算简算例题如下
20.5×(0.032÷0.08)
=20.5×(3.2÷8)
=(20+0.5)×0.4
=8+0.2
=8.2
此题首先是运用了几个数同时扩大或者缩小相同倍数的原理。这里同时扩大了100倍