Question

(0.1+0.23+0.34)乘以（0.23+0.34+0.56）减去（0.1+0.23+0.56）乘以（0.23+0.34）怎么算(简算）

Answer 1

(0.1+0.23+0.34)乘以（0.23+0.34+0.56）减去（0.1+0.23+0.56）乘以（0.23+0.34）
=(0.1+0.23+0.34)乘以（0.23+0.34+0.56）-（0.1+0.23+0.34+0.22）乘以（0.23+0.34）
=(0.1+0.23+0.34)*（0.23+0.34)+(0.1+0.23+0.34)*0.56-（0.1+0.23+0.34)*（0.23+0.34）
-0.22*（0.23+0.34）
=0.1*0.56+(0.23+0.34)*0.56-0.22*（0.23+0.34）
=0.1*0.56+(0.23+0.34)*(0.56-0.22)
=0.056+0.57*0.34
=0.056+0.1938
=0.2498

Answer 2

(0.1+0.23+0.34)×（0.23+0.34+0.56）－（0.1+0.23+0.56）×（0.23+0.34）

设：（0.23+0.34＋0.56）为a，（0.1+0.23+0.56）为b
则：a（b＋0.1）－b（a－0.56）＝ab＋0.1a－ab＋0.56b