420*(945÷15-28)怎么简便计算?

2025-04-05 14:41:56
推荐回答(2个)
回答1:

420x(945÷15-28)
=420x(63-28)
=420x35
=420x5x7
=2100x7
=14700

回答2:

420×[(900+45)÷15-28]
=420×(60+3-28)
=420×35
=400×35+20×35
=14000+700
=14700