用简便方法计算 (69.9-4.74-5.16)×6.5 [3.5+(15-1.5)]×7.6 13.75-(3.75+
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/08/20 05:11:54
用简便方法计算 (69.9-4.74-5.16)×6.5 [3.5+(15-1.5)]×7.6 13.75-(3.75+6.48) 3.68+7.56-2.68
![用简便方法计算 (69.9-4.74-5.16)×6.5 [3.5+(15-1.5)]×7.6 13.75-(3.75+](/uploads/image/z/15294099-3-9.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97+%EF%BC%8869.9-4.74-5.16%EF%BC%89%C3%976.5+%5B3.5%2B%2815-1.5%29%5D%C3%977.6+13.75-%EF%BC%883.75%2B)
(69.9-4.74-5.16)×6.5
=(69.9-9.9)×6.5
=60×6.5
=390
[3.5+(15-1.5)]×7.6
=(3.5+15-1.5)×7.6
=17×7.6
=129.2
13.75-(3.75+6.48)
=13.75-3.75-6.48
=10-6.48
=3.52
3.68+7.56-2.68
=3.68-2.68+7.56
=1+7.56
=8.56
=(69.9-9.9)×6.5
=60×6.5
=390
[3.5+(15-1.5)]×7.6
=(3.5+15-1.5)×7.6
=17×7.6
=129.2
13.75-(3.75+6.48)
=13.75-3.75-6.48
=10-6.48
=3.52
3.68+7.56-2.68
=3.68-2.68+7.56
=1+7.56
=8.56