(-12)+11+(-8)+(+39)=?
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(-12)+11+(-8)+(+39)=?
(-12)+11+(-8)+(+39)=?
(-12)+11+(-8)+(+39)=?
(-12)+11+(-8)+(+39)
=-12+11-8+39
=-(12+8)+(11+39)
=-20+50
=30
=-12+11-8+39
=(11+39)-(12+8)
=50-20
=30
(-12)+11+(-8)+(+39)
=-12+11-8+39
=39+11-12-8
=50-20
=30
=(-1)+(-8)+(+39)=(-7)+(+39)=32
(-12)+11+(-8)+39
=-1+(-8)+39
=-9+39
=30
(-12)+11+(-8)+(+39)=?
-12+11-8+39
-12+11-8+39
计算:(-12)+11+(-8)+39
-12+11-8+39-52
在□里填上合适的数:39×8+□×39-11×39=39×20
40×11+48×39+8×11=?怎样简算
计算:﹣11+|12﹣(39-8)|
11 12 14 n 21 26 32 39,n=
11 12 14 n 21 26 32 39,n=
12/7-3/11+8/11=
[(17*27+7)/27+(27*17+7)/17-(11*39+37)/39]/[(8*27+17)/27+(13*17+12)/17-(5*39+38)/39]
8x-27+16=39-12x
8x-27+16=39-12x
(17 7/27+27 7/17-11 37/39)/(13 12/17+8 17/27-5 38/39)好难
(-12)+11+(-8)+(-7)+39+7用两种方法计算
12+11+10+9+8+7=
3/8+x=11/12