Question

0.7777×7.9+2.1×0.1111 简便计算 要过程 仔细点的 不要解方程那类的 还有哦 在最后再把每一步为什么这样

把过程写出来，把每一步什么要这样做也写出来0.7777×0.7＋0.1111×5.1
=0.1111×7×0.7＋0.1111×5.1
=0.1111×(7×0.7)＋0.1111×5.1
=0.1111×(7×0.7+5.1)
=0.1111×(4.9+5.1)
=0.1111*10
=1.111这种格式，但是为什么会多一个七啊？

Answer 1

0.7777×0.7＋0.1111×5.1
=（0.1111×7）×0.7＋0.1111×5.1
=0.1111×7×0.7＋0.1111×5.1
=0.1111×(7×0.7)＋0.1111×5.1
=0.1111×(7×0.7+5.1)
=0.1111×(4.9+5.1)
=0.1111*10
=1.111

Answer 2

0.7777×7.9+2.1×0.1111
把过程写出来，把每一步什么要这样做也写出来0.7777×0.7＋0.1111×5.1
前后不照啊

Answer 3

6.37714，无简便方法。可能是题目的问题
0.7777×7.9+2.1×0.1111
=0.1111*55.3+（2+0.1）*0.1111
=0.4*0.1111+5*0.1111+50*0.1111

Answer 4

因为0.1111x7啊！