1/6x(5-2/3) 7/8x7+3/8
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1/6x(5-2/3)7/8x7+3/81/6x(5-2/3)7/8x7+3/81/6x(5-2/3)7/8x7+3/81/6x(5-2/3)=1/6x5-1/6x2/3=5/6-1/9=15/18-
1/6x(5-2/3) 7/8x7+3/8
1/6x(5-2/3) 7/8x7+3/8
1/6x(5-2/3) 7/8x7+3/8
1/6x(5-2/3)
=1/6x5-1/6x2/3
=5/6-1/9
=15/18-2/18
=13/18
7/8x7+3/8
=1/8x7x7+1/8x3
=1/8x(49+3)
=1/8x52
=13/2
=1/6X(6-1-2/3)
=1-1/6X5/3
=1-5/18
=13/18
=7/8x7+3/8
=7/8x(8-1)+3/8
=7-1/8+3/8
=7+1/4
=7又4分之1
希望能帮你忙,不懂请追问,懂了请采纳,谢谢
1、1/6x(5-2/3) 2、7/8x7+3/8
1/6x(5-2/3) 7/8x7+3/8
(1/2-3/7)x7/25+2/5=?
第一道 (-18分之7)x7分之3x(-2.4) 第二道 2除以(-7分之3)X7分之4除以(-5又7分之1)
(1-1/2x4)x(1-3/3x5)x(1-5/4x6)x(1-7/5x7)x(1-9/6x8)x(1-11/7x9)x(1-13/8x10)x(1-15/9x11)
解方程:5x-3x7/10=5/7
把下面的等式改写成比例.(1)3X40=8X15 (2)5分之3X7分之4=5分之4X7分之3
(X7)/ 6 = 8X()= 4/3?X)= 6/1 +()= 1
(x-10)x7/8=56 x除(1+3/5)=13/4 要计算过程
(x+1)6次方(2x-3)2次方的展开式中x7次方的系数
解方程+脱式计算--------------------------解方程--------------------2x X7/10=142x-3/5x=41/6x÷12=8/9------------------------脱式计算--------------------7/8X25X4==5-0.64X7/8÷4==(0.8+1/2)X5/4==(22+11/12)÷11/24==15/64÷(3/4+1/8
2/1 X 3/1 +12/5 X 2/1 5/4 X7/5 -2/1 (6+15/2)X5
巧算:1x2+2x3+3x4+4x5+5x6+6x7...+8x9
2X/1x3+2X/3x5+2X/5x7+2x/7x9+2x/9x11=10 x=?
-13x3/2+3/1x(-13)-0.34x7/2-7/5x0.34用简便方法计算
3/2x(2.25+25/6)x7.7%]-15/13=?
3/2x(2.25+25/6)x7.7%]-15/13=?
-10.5x(-6分之1-4分之1)x7分之3除以(-0.5)