Question

5又1/9÷(-2又1/27)

[-2/3+(-1/9)-5/6-(-1/27)]÷（-二十七分之一）
（-1/15）÷（-1/30）-3/10÷(-1/30)-(-6/5)÷1/30
1/2-(-2又1/4)+(-1/3)-1/4-(+1/6)

Answer 1

(1)
[-2/3+(-1/9)-5/6-(-1/27)]÷（-二十七分之一）
=(-2/3-1/9-5/6+1/27)x(-27)
=-(-2/3-1/9-5/6+1/27)x27
=(2/3+1/9+5/6-1/27)x27
=2/3×27+1/9×27+5/6×27-1/27×27
=18+3+45/2-1
=20+45/2
=42.5
（2）原式
=1/15÷（1/30）+3/10÷(1/30)+6/5÷1/30
=(1/15+3/10+6/5)÷1/30
=(1/15+3/10+6/5)×30
=1/15×30+3/10×30+6/5×30
=2+3+36
=41
（3）原式
=1/2+2又1/4-1/3-1/4-1/6
=2又1/4+6/12-4/12-3/12-2/12
=2又1/4-1/4
=2