69×44简便计算法,1200-624-76简便计算法

2025-04-04 21:41:10
推荐回答(4个)
回答1:

69×44简便计算法:
69x44
=(70-1)x44
=70x44-1x44
=3040-44
=2996
1200-624-76简便计算法
1200-624-76
=1200-(624+76)
=1200-700
=500

回答2:

回答3:

69x44
=(70-1)x44
=3080-44
=3036

1200-624-76
=1200-(624+76)
=1200-700
=500

回答4:

1200—624—76=500