Question

五年级84×2.6+2.2×28简便计算怎么算？

Answer 1

题目是84*2.6+2.2*28
84*2.6+2.2*28
解：原式=3*28*2.6+2.2*28
=28*7.8+2.2*28
=28*（7.8+2.2）
=28*10
=280

Answer 2

简便计算方法是:
83x2.6+2.2x28
=28x3x2.6+2.2x28
=28（7.8+2.2）
=28x1
=28

Answer 3

84×2.6+2.2×28=28×3×2.6+2.2×28=28×(3×2.6+2.2)=28×(7.8+2.2)=28×10=280

Answer 4

解:简便运算如下:
84x2.6+2.2x28
=(28x3x2.6)+28x2.2
=28x(3x2.6)+28x2.2
=28x(7.8+2.2)
=28x10
=280

Answer 5

简便运算如下所示，84×2.6+2.2×28＝28×3×2.6+2.2×28＝28×7.8+2.2×28＝28×（7.8+2.2）＝28×10＝280