Question

2.1*0.78+0.22*2.1的简便计算

2.1*0.78+0.22*2.1的简便计算

Answer 1

2.1*0.78+0.22*2.1=2.1*（0.78+0.22）=2.1*1=2.1

Answer 2

原式等于
2.1×（0.78+0.22）
=2.1×1
=2.1
有异议欢迎追问~
无异议记得采纳~

Answer 3

2.1×（0.78+0.22）
=2.1×1
=2.1 采纳谢谢 拒绝伸手党

Answer 4

2.1*（0.78+0.22）=2.1