如何运用简便算法计算3.572/0.47*1.52

原题有误吧 应该是1.25 不是1.52
3.572/0.47*1.25
=7.6*1.25
=（8-0.4）*1.25
=8*1.25-0.4*1.25
=10-0.5
=9.5

3572=2x2x19x47
152=2x2x2x19
3.572/(0.47*1.52)
=35720/(47*152)
=(2x2x19x47x10)/(47x2x2x2x19)
=5

3.572/0.47*1.52
=3.572/0.47*1.52
=7.6*1.52
=11.552
如是3.572/（0.47*1.52)
=(7.6*0.47)/（0.47*1.52)
=5