125x28十25x28简便方法

2025-03-06 12:18:08
推荐回答(1个)
回答1:

原式
=125x(24+4)+25x4x7
=125x24+125x4+100x7
=125x8x3+500+700
=1000x3+1200
=3000+1200
=4200

或者
=(125+25)x28
=150x28
=150x30-150x2
=4500-300
=4200