62478 46589 简便计算.

分类: 作业答案 • 2021-12-20 01:24:22

问题描述：

624*78 46*589 简便计算.

答

624*78
=624*(100-22)
=62400-13728
=48672
46*589
=(50-4)*589
=29450-2356
=27094

答

624*78 =(600+24)*(80-2)=600*80+80*24-600*2-24*2=48672

答

624*78
=624*(100-22)
=62400-13728
=48672
46*589
=(50-4)*589
=29450-2356
=27094

624*78 46*589 简便计算.