化简下列各式:(1)8x-(-3x-5) (2)(3x-1)-(2-5x) (3)(-4y+3)-(-5y-2) (4)3x+1-2(4-x)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 23:22:18
![化简下列各式:(1)8x-(-3x-5) (2)(3x-1)-(2-5x) (3)(-4y+3)-(-5y-2) (4)3x+1-2(4-x)](/uploads/image/z/173202-42-2.jpg?t=%E5%8C%96%E7%AE%80%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%EF%BC%9A%EF%BC%881%EF%BC%898x-%EF%BC%88-3x-5%EF%BC%89+%EF%BC%882%EF%BC%89%EF%BC%883x-1%EF%BC%89-%EF%BC%882-5x%EF%BC%89+%EF%BC%883%EF%BC%89%EF%BC%88-4y%2B3%EF%BC%89-%EF%BC%88-5y-2%EF%BC%89+%EF%BC%884%EF%BC%893x%2B1-2%EF%BC%884-x%EF%BC%89)
化简下列各式:(1)8x-(-3x-5) (2)(3x-1)-(2-5x) (3)(-4y+3)-(-5y-2) (4)3x+1-2(4-x)
化简下列各式:(1)8x-(-3x-5) (2)(3x-1)-(2-5x) (3)(-4y+3)-(-5y-2) (4)3x+1-2(4-x)
化简下列各式:(1)8x-(-3x-5) (2)(3x-1)-(2-5x) (3)(-4y+3)-(-5y-2) (4)3x+1-2(4-x)
(1)原式=8x+3x+5
=11x+5
(2) 原式=3x-1-2+5x
=8x-3
(3) 原式=-4y+3+5y+2
=5+y
(4 ) 原式=3x+1-8+2x
=5x-7
(1)8x+3x+5=11x+5
(2)3x-1+2+5x=8X+1
(3)-4y+3+5y+2=y+5
(4)3x+1-8+2x=5x-7
(1)=8x+3x+5=11x+5
(2)=3x-1-2+5x=8x-3
(3)=-4y+3+5y+2=y+5
(4)=3x+1-8+2x=5x-7
LZ你好,化简这些方程需要耐心和细心,掌握基本的四则运算法则,合并同类项,就成了。
(1)8x-(-3x-5) =8x+3x+5=11x+5
(2)(3x-1)-(2-5x) =3x-1-2+5x=8x-3
(3)(-4y+3)-(-5y-2)= (-4y)+3+5y+2)= y+5
(4)3x+1-2(4-x)=3x+1-8+2x=5x-7
方法总结:
全部展开
LZ你好,化简这些方程需要耐心和细心,掌握基本的四则运算法则,合并同类项,就成了。
(1)8x-(-3x-5) =8x+3x+5=11x+5
(2)(3x-1)-(2-5x) =3x-1-2+5x=8x-3
(3)(-4y+3)-(-5y-2)= (-4y)+3+5y+2)= y+5
(4)3x+1-2(4-x)=3x+1-8+2x=5x-7
方法总结:
难点主要是在拆括号,你记着下面就行了:
±a(b±c)=(±ab)±(±ac)
收起