Question

5.6x69.2+693.2x0.4用简便方法？

Answer 1

5.6x69.2+693.2x0.4用简便方法？
解题思路：不能进行简便运算的按顺序计算，简便运算核心是运用加法和乘法各种定律进行计算，计算出整数部分方便后续计算的过程
解题过程：

5.6×69.2+693.2×0.4

=387.52+693.2×0.4

=387.52+277.28

=664.8

存疑请追问，满意请采纳

Answer 2

5.6x69.2+693.2x0.4用简便方法？
利用乘法分配律进行简便运算。

Answer 3

5.6x69.2+693.2x0.4=0.4*（14*69.2+693.2）=0.4*1662=664.8

Answer 4

5.6x69.2+693.2x0.4
=5.6*69.2+(69.2+0.12)*10*0.4
=(5.6+4)*69.2+0.48
=69.2*9.6+9.6*0.05
=69.25*(10-0.4)
=692.5-69*0.4-0.25*0.4
=692.5-27.6-0.1
=664.8