六点五乘九点九加零点六五用简便计算怎么算

2025-04-08 10:38:21
推荐回答(1个)
回答1:

6.5×9.9+0.65
=6.5×9.9+6.5×0.1
=6.5×(9.9+0.1)
=6.5×10
=65