96个1.2相乘减去100个0.4相乘的和结果的为数是多少.(寻求方法)

96*1.2-100*0.4
=4(9.6*3-10)
=4(28.8-10)
=4*18.8
=75.2

A

96*1.2-100*0.4
=96*1.2-(96*0.4+4*0.4)
=96*(1.2-0.4)-4*0.4
=96*0.8-4*0.4
=96*0.8-2*0.8
=94*0.8
=75.2

96*1.2-100*0.4
=12*8*1.2-50*2*0.4
=144*0.8-50*0.8
=(144-50)*0.8
=94*0.8
=75.2

96*1.2-100*0.4
=96*3*0.4-100*0.4
=288*0.4-100*0.4
=(288-100)*0.4
=188*0.4
=75.2

数学题出题一定要准确，不知是不是想问96个1.2相乘尾数如何计算:
1.2
1=2
1.2*1.2
2=4
1.2*1.2*1.2
3=8
1.2*1.2*1.2*1.2
4=6
1.2*1.2*1.2*1.2*1.2
5=2
.
.
.
1.2*1.2........*1.2
96=6

n个1.2相乘，当然n是正整数，当n小于4时，直接用以下对应值,当n=4或是4的倍数时，尾数为6，当n大于4且不是4的倍数时，用n除以4的余数对应：
1尾数2
2尾数3
3尾数8

0.4那个，n等于奇数时尾数为4,偶数时尾数为8.