-7+(+7)-(-15)-1= -2.8-6.2+(-3.4)-(-5.6)= ()+ -3.6=0.36.这个数是.(--7+(+7)-(-15)-1=-2.8-6.2+(-3.4)-(-5.6)=()+ -3.6=0.36.这个数是.(-14)-(+5)=-9错哪里了.
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-7+(+7)-(-15)-1=-2.8-6.2+(-3.4)-(-5.6)=()+-3.6=0.36.这个数是.(--7+(+7)-(-15)-1=-2.8-6.2+(-3.4)-(-5.6)=()
-7+(+7)-(-15)-1= -2.8-6.2+(-3.4)-(-5.6)= ()+ -3.6=0.36.这个数是.(--7+(+7)-(-15)-1=-2.8-6.2+(-3.4)-(-5.6)=()+ -3.6=0.36.这个数是.(-14)-(+5)=-9错哪里了.
-7+(+7)-(-15)-1= -2.8-6.2+(-3.4)-(-5.6)= ()+ -3.6=0.36.这个数是.(-
-7+(+7)-(-15)-1=
-2.8-6.2+(-3.4)-(-5.6)=
()+ -3.6=0.36.这个数是.
(-14)-(+5)=-9错哪里了.
-7+(+7)-(-15)-1= -2.8-6.2+(-3.4)-(-5.6)= ()+ -3.6=0.36.这个数是.(--7+(+7)-(-15)-1=-2.8-6.2+(-3.4)-(-5.6)=()+ -3.6=0.36.这个数是.(-14)-(+5)=-9错哪里了.
-7+(+7)-(-15)-1
=-7+7+15-1
=22-8
=14
-2.8-6.2+(-3.4)-(-5.6)
=-2.8-6.2-3.4+5.6
=5.6-(2.8+6.2+3.4)
=5.6-12.4
=-6.8
()+ -3.6=0.36.这个数是.
0.36-(-3.6)
=0.36+3.6
=3.96
答:这个数是3.96.
(-14)-(+5)=-9错哪里了.
(-14)-(+5)
=-14-5
=-19
1:8.8-7/9-(0.8+7/9) 2.(1/15+2/17)×15×17
()*2.()=7
有理数乘法:1、(-15)*(+38)+(-15)*(-30)+(-7)*(-50)-(-7)*(-40)=
(7/15x+12)+1/2(7/15x +12)=x
解方程(3/7)*X+1=(X+1)*(7/15)
(x-15)/15=7/3
(-7/8)乘15乘(1又1/7)= 列算式
8/9-5/12= 7/15-3/20-1/20+3/15 =(7/15+3/15)-(3/20+1/20) =10/15-4/20 = 7/15-3/20-1/20+3/15 =(7/15+3/15)-(3/20+1/20) =10/15-4/20 = 是7/15-3/20-1/20+3/15 =(7/15+3/15)-(3/20+1/20)=10/15-4/20 = (简算)
(-15)-3-7+8=( )
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
30*(1&2+2&5-7&15)=
X*(1+15%)*90%-X=7
15分之7×( )=( )×2又3分之1=()×0.45=1
计算 1(-8)×(-4又20分之1)×1.25×(-0.1)=【 】2.(2分之1-6分之5+12分之5-24分之7)×(-24)=【 】3.71又16分之15×(-8)=【 】4.(-3.59)×(-22分之7)-2.41×(-22分之7)+6×(-22分之7)=【 】
判断题 1.异分母分数不能直接相加减是因为分数单位不同.( )2.分数2/3、12/15、9/54都不能化成有限小数.( )3.1-5/7-1/7=1-4/7=3/7.( )4.3/10-(14/15-7/10)=(3/10+7/10)-14/15.( )
(1)1/5(x+15)=1/2-1/3(x-7)
1/5=( )÷15=7:( )=( )%怎样填空
15分之14×8=(7+1)×15分之14(要过程)