Question

5.4×9.4 3.6×8.4,简便方法？

Answer 1

5.4×9.4+3.6×8.4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：

5.4×9.4+3.6×8.4

=5.4×8.4+3.6×8.4+5.4

=(5.4+3.6)×8.4+5.4

=10×8.4-8.4+5.4

=84-3

=81.1

存疑请追问，满意请采纳

Answer 2

5.4×9.4 +3.6×8.4
=1.8×28.2+1.8×16.8
=1.8×(28.2+16.8)
=1.8×45
=81.

Answer 3

5.4×9.4+3.6×8.4

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=5.4×9.4+3.6×9.4－3.6

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=9.4×(5.4+3.6)－3.6

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=9.4×9－3.6

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=84.6－3.6

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=81

Answer 4

5.4X9.4+3.6X8.4
=5.4X8.4+5.4X1+3.6X8.4
=8.4X(5.4+3.6)+5.4
=8.4X10-8.4X1+5.4
=84-(8.4-5.4)
=84-3
=81