12.5*9.8-4.9*5怎么简便
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 16:30:22
![12.5*9.8-4.9*5怎么简便](/uploads/image/z/580003-43-3.jpg?t=12.5%2A9.8-4.9%2A5%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF)
12.5*9.8-4.9*5怎么简便
12.5*9.8-4.9*5怎么简便
12.5*9.8-4.9*5怎么简便
12.5 × 9.8 - 4.9 × 5
= 12.5 × 2 × 4.9 - 4.9 × 5
= 25 × 4.9 - 4.9 × 5
= 4.9 × (25 - 5)
= 4.9 × 20
= 98
12.5*9.8-4.9*5
=12.5*2*4.9-4.9*5
=25*4.9-4.9*5
=4.9*(25-5)
=4.9*20
=98
25*4.9-4.9*5
=4.9*(25-5)
=4.9*20
=98