2又2/1X15/4-3/1X2/5+5/2X2/5=?
1个回答
先乘除後加减
2又2/1X15/4-3/1X2/5+5/2X2/5=?
分三段算
2又2/1X15/4=2/3
3/1X2/5=5/6
5/2X2/5=1
2/3-5/6+1=5/6
相关问题
(1)1又5分之3x+3又2分之1=8 (2) 4.3x-2.8x=15 (3) 6x-2.5=9.5
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(1)(2x-1)2=9(2)x2-2x-4=0(3)(x-2)(x-5)=-2(4)x(x-3)=15-5x
3(5-4x)=9 5/8x-1/3x-1/2=2/3 2/5(1-0.375x)=4/15
x-5/15
已知x^2/x^4+x^2+1=1/4 求5x^4-15x^2+5/3x^2
3(3x+5)=2(2x-1) -5(3x+4)=15(4x-3)