解,(1/8+1/3-1/4)÷1/12 =1/8x12+1/3x12-1/4x12 =3/2+4-3 =3/2+1 =5/2
(1/8+1/3-1/4)÷1/24= (1/8+1/3-1/4)x24=1/8x24+1/3x24-1/4x24=3+8-6=5。
=(3/24+8/24-6/24)×24=5/24×24=5
(1/8+1/3-1/4)÷1/24=1/8x24+1/3x24-1/4x24=3+8-6=5