1.25*1.251.25,100个相乘,得数乘以99个0.8相乘的得数,结果多少,简便算式,
1.25*1.25*……*1.25*0.8*0.8……*0.8
=1.25*(1.25*0.8)*(1.25*0.8)*……*(1.25*0.8) 99个(1.25*0.8)
=1.25*1*1……*1 99个1
=1.25
1.25*1.25*1.25,...*0.8*0.8*0.8.....
=(1.25*0.8)*(1.25*0.8)*(1.25*0.8)......*1.25
=1*1*1*....*1.25
=1.25
望采纳哦
1.25^100×0.8^99
=1.25×1.25^99×0.8^99
=1.25×(1.25×0.8)^99
=1.25
100*(1.25*0.8)-0.8=100*1-0.8=100-0.8=99.2
1.25^100×0.8^99
=1.25×1.25^99×0.8^99
=1.25×(1.25×0.8)^99
=1.25×1^99
=1.25
1.25^100×0.8^99
=1.25×1.25^99×0.8^99
=1.25×(1.25×0.8)^99
=1.25×1^99
=1.25
a^b是b个a相乘的幂。
注:为方便,a个b相乘可以表示为b^a
1.25^100*0.8^99
=1.25*1.25^99*0.8^99
=1.25*(1.25^99*0.8^99)
=1.25*(1.25*0.8)^99
=1.25*1^99
=1.25*1
=1.25
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