4.21×(-七分之四)+七分之四×(-2.79)+8×一百分之一×125 简便运算
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 10:33:04
![4.21×(-七分之四)+七分之四×(-2.79)+8×一百分之一×125 简便运算](/uploads/image/z/201639-39-9.jpg?t=4.21%C3%97%EF%BC%88-%E4%B8%83%E5%88%86%E4%B9%8B%E5%9B%9B%EF%BC%89%2B%E4%B8%83%E5%88%86%E4%B9%8B%E5%9B%9B%C3%97%EF%BC%88-2.79%EF%BC%89%2B8%C3%97%E4%B8%80%E7%99%BE%E5%88%86%E4%B9%8B%E4%B8%80%C3%97125+%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
4.21×(-七分之四)+七分之四×(-2.79)+8×一百分之一×125 简便运算
4.21×(-七分之四)+七分之四×(-2.79)+8×一百分之一×125 简便运算
4.21×(-七分之四)+七分之四×(-2.79)+8×一百分之一×125 简便运算
4.21×(-4/7)+4/7×(-2.79)+8×1/100×125
=-4/7X(4.21+2.79)+8X125X1/100
=-4/7X7+1000X1/100
=-4+10
=6