5x25x (40十4)简便计算

2025-04-05 23:08:54
推荐回答(1个)
回答1:

5×25×(40+4)
=5×25×40+5×25×4
=5×(25×40)+5×(25×4)
=5×1000+5×100
=5000+500
=5500
恐龙所见略同。原来有做的了啊