58×59一59十43×59用脱式计算

2025-02-27 15:34:18
推荐回答(1个)
回答1:

58×59一59十43×59
59×(58-1+43)
=59×100
=5900
(67+67+67+67)×25
=67×(4×25)
=67×100
=6700
278-(28+178)
=278-178-28
=100-28
=72