8.6x5.7+4.3x4.3x2(巧算)

问题描述:

8.6x5.7+4.3x4.3x2(巧算)

8.6x5.7+4.3x4.3x2
=8.6x5.7+4.3x2x4.3
=8.6x5.7+8.6x4.3
=8.6x(5.7+4.3)
=8.6x10
=86