十三分之十一-十三分之十一×三十三分之十三简便计算
(11/13)-(11/13)*(13/33)
=(11/13)-(1/3)
=(33-13)/39
=20/39
11/13-11/13*13/33=(1-13/33)*11/13=20/33*11/13=20/39
36*13/37=37*13/37-13/37=12又24/37
12÷(1+1/3-5/6)=12÷(1-5/6+1/3)=12÷(1/6+1/3)=12÷1/2=24
2、原式等于12/(1+1/3-5/6)=12/(1+1/3-1/3-1/2)=12/(1-1/2)=12*2=24