299 778+333+666简便算法299×778+333+666
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 14:34:49
![299 778+333+666简便算法299×778+333+666](/uploads/image/z/1044053-53-3.jpg?t=299+778%2B333%2B666%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95299%C3%97778%EF%BC%8B333%EF%BC%8B666)
299 778+333+666简便算法299×778+333+666
299 778+333+666简便算法
299×778+333+666
299 778+333+666简便算法299×778+333+666
299 778+333+666
=299 777+333+666+1
=299 777+1000
=300777
299 778+333+666
= 299 778+999
= 299 777+1000
= 300 777
299×778+333+666
=(300-1)×778+999
=233440-778+(778+221)
=233440-778+778+221
=233440+221
=233661