8+(-9)+2+(-1) (-7)+4+(-3)+(-4) 3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分之3+7分之4加(-5分之1) 4
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 17:54:08
![8+(-9)+2+(-1) (-7)+4+(-3)+(-4) 3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分之3+7分之4加(-5分之1) 4](/uploads/image/z/1123944-24-4.jpg?t=8%EF%BC%8B%EF%BC%88-9%EF%BC%89%EF%BC%8B2%EF%BC%8B%EF%BC%88-1%29+%28-7%29%EF%BC%8B4%EF%BC%8B%EF%BC%88-3%EF%BC%89%EF%BC%8B%EF%BC%88-4%EF%BC%89+3.47%EF%BC%8B%EF%BC%88-2.7%EF%BC%89%EF%BC%8B%28-3.47%29%EF%BC%8B%EF%BC%88-2.3%EF%BC%89+%EF%BC%88-1%E5%8F%887%E5%88%86%E4%B9%8B1%EF%BC%89%EF%BC%8B5%E5%88%863.47%EF%BC%8B%EF%BC%88-2.7%EF%BC%89%EF%BC%8B%EF%BC%88-3.47%EF%BC%89%EF%BC%8B%EF%BC%88-2.3%EF%BC%89+++++++++++++++%EF%BC%88-1%E5%8F%887%E5%88%86%E4%B9%8B1%EF%BC%89%EF%BC%8B5%E5%88%86%E4%B9%8B3%EF%BC%8B7%E5%88%86%E4%B9%8B4%E5%8A%A0%EF%BC%88-5%E5%88%86%E4%B9%8B1%EF%BC%89+++++4)
8+(-9)+2+(-1) (-7)+4+(-3)+(-4) 3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分之3+7分之4加(-5分之1) 4
8+(-9)+2+(-1) (-7)+4+(-3)+(-4) 3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分
3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分之3+7分之4加(-5分之1) 4又2分之1-7又2分之1
8+(-9)+2+(-1) (-7)+4+(-3)+(-4) 3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分3.47+(-2.7)+(-3.47)+(-2.3) (-1又7分之1)+5分之3+7分之4加(-5分之1) 4
(1) 8+(-9)+2+(-1) = (8+2)+[(-9)+(-1)] = 10+(-10) = 0
(2) (-7)+4+(-3)+(-4) = (-7) + [4+(-4)] +( -3) = (-7)+(-3) = -10
(3) 3.47+(-2.7)+(-3.47)+(-2.3) = [3.47+(-3.47)] + [(-2.7)+(-2.3)] = 0+(-5) = -5
(4) (-1又7分之1)+5 = -1又7分之1 + 4又7分之7 = 3又7分之6
1, =10-9+7-3=5
2, =-2.7-2.3=-5
3, 题目怎么没写完啊
4,=-4/7+2/5=-6/35
你为什么不自己思考呢 这么简单 动动脑子拜托