用简便算法计算:(3.4*4.8*9.5)除(1.9*1.7*2.4)
问题描述:
用简便算法计算:(3.4*4.8*9.5)除(1.9*1.7*2.4)
答
:(3.4*4.8*9.5)除(1.9*1.7*2.4)
=(1.7*2*2.4*2*1.9*5)除(1.9*1.7*2.4)
=20
答
3.4是1.7的二倍,4。8是2.4的二倍,9.5是1.9的5倍,所以结果是2*2*5=20
答
=(3.4÷1.7)*(4.8÷2.4)*(9.5÷1.9)
=2*2*5
=20
答
原式=(2*1.7*2*2.4*5*1.9)/(1.9*1.7*2.4)
=2*2*5
=20