42✘43.3+(12.5-5.8)✘4.2这题简便运算怎么做？

Question

如题所述

Answer 1

42x43.3+(12.5-5.8)x4.2
=42x43.3+6.7x4.2
=42x43.3+42x0.67
=42x(43.3+0.67)
=42x43.97
=1846.74本回答被网友采纳

Answer 2

应该是
4.2×43.3+（12.5-5.8）×4.2
=4.2×43.3+6.7×4.2
=4.2×（43.3+6.7）
=4.2×50
=210