1、(1/3+1/4+1/6)÷1/12 = (1/3+1/4+1/6)*12 =(1/3)*12+ (1/4)*12+ (1/6)*12=4+3+2=9
2、18÷7/6+6×1/7+16/7÷1/6 =18*6/7+6*1/7+16/7*6=(18*6+6+16*6)/7=(18+1+16)*6/7=35/7*6=30
3、6/5÷(1/2-4/7×7 /12 ) =6/5÷(1/2-1/3)=6/5÷1/6=36/5
1、(1/3+1/4+1/6)÷1/12 = (1/3+1/4+1/6)*12 =(1/3)*12+ (1/4)*12+ (1/6)*12=4+3+2=9
2、18÷7/6+6×1/7+16/7÷1/6 =18*6/7+6*1/7+16/7*6=(18*6+6+16*6)/7=(18+1+16)*6/7=35/7*6=30
3、6/5÷(1/2-4/7×7 /12 ) =6/5÷(1/2-1/3)=6/5÷1/6=36/5