15*(-3/4)-15*(-2/3) 8*(-2/5)-(-4)*(-2/9)+(-8)*3/5
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15*(-3/4)-15*(-2/3)8*(-2/5)-(-4)*(-2/9)+(-8)*3/515*(-3/4)-15*(-2/3)8*(-2/5)-(-4)*(-2/9)+(-8)*3/515*(
15*(-3/4)-15*(-2/3) 8*(-2/5)-(-4)*(-2/9)+(-8)*3/5
15*(-3/4)-15*(-2/3) 8*(-2/5)-(-4)*(-2/9)+(-8)*3/5
15*(-3/4)-15*(-2/3) 8*(-2/5)-(-4)*(-2/9)+(-8)*3/5
15*(-3/4)-15*(-2/3)
=15*(-3/4)+15*(2/3)
=15*(-3/4+2/3)
=15*(-9/12+8/12)
=15*(-1/12)
=-15/12
=-5/4
=负一又四分之一.
8*(-2/5)-(-4)*(-2/9)+(-8)*3/5
=-8*2/5-8*3/5-4*2/9
=-8(2/5+3/5)-8/9
=-8-8/9
=-8(1+1/9)
=-8*10/9
=-80/9=负八又九分之八.
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15*(-3/4)-15*(-2/3) 8*(-2/5)-(-4)*(-2/9)+(-8)*3/5=(-45/4)-(-10)*8(-2/5)-8/9+(-24/5)=(-45/4)-160/5-8/9-24/5= (-45/4)-32-8/9-24/5=-8089/180
15*(3/4)-(-15)*2/3+15*1/4
(-5/12)×4/15×(-3/2)×(-6)
(2/3-4/5+1/2)÷(-15)
0,3/2,8/3,15/4,24/5,()
-2,3,-4,-7,-8,15,-16,( ),( )
(4/5-2/3)*15/2=?
(-1)*(-5/4)*8/15*3/2*(-2/3)*0*(-1)15分钟坐等 要脱式
计算:15/28×27+15/28=?0.64×【2-(3/4+3/8)】=?
计算:15/28×27+15/28=?0.64×【2-(3/4+3/8)】=?
计算:(-15又2/3)+【13又2/3-|-4又2/15|+(-4又1/5)】
15×3分之2等于15÷( )×( )
15*(-3/4)-15*(-2/3) 8*(-2/5)-(-4)*(-2/9)+(-8)*3/5
(2/3+4/5)除以1/15等于多少?
4/5÷(2/3×15/7)简便计算
(3/4-1/2)x=14/15
3/4x+(15-x)×2=30
(1)4/3,1,2,7,()(2)3/15,1/3,3/7,1/2,()
1.-25×(-15分之7)+13×(-15分之7)-3×(-15分之7)2.{4又3分之2×(-15分之4)+(-0.4)÷(-15分之4)}×1又5分之1