102*39.5简算

分类: 作业答案 • 2022-06-23 12:41:29

问题描述：

102*39.5简算

答

102*39.5=(100+2)*39.5=100*39.5+2*39.5=3950+2*(40-0.5)=3950+80-1=4029

答

102*39.5
=（100+2）*（40-0.5）
=100*40+2*40-100*0.5-2*0.5
=4000+80-50-1
=4029

答

102× 39.5
= （100 +2）× 39.5
= 3950+ 79
= 4029

答

102*39.5
=100*39.5+2*39.5
=3979