1、2/3=(2×3)/(3×3)=6/9 因为6/9>5/9，所以2/3>5/9. 3/4=(3×5)/(4×5)=15/20 4/5=(4×4)/(5×4)=16/20 因为15/30<16/20,所以3/4<4/5. 3/10=(3×3)/(10×3)=9/(30 ) 1/6=(1×5)/(6×5)=5/30 因为9/30>5/30,所以3/10<1/6. 3/8=(3×3)/(8×3)=9/24 7/12=(7×2)/(12×2)

1、2/3=(2×3)/(3×3)=6/9 因为6/9>5/9，所以2/3>5/9. 3/4=(3×5)/(4×5)=15/20 4/5=(4×4)/(5×4)=16/20 因为15/30<16/20,所以3/4<4/5. 3/10=(3×3)/(10×3)=9/(30 ) 1/6=(1×5)/(6×5)=5/30 因为9/30>5/30,所以3/10<1/6. 3/8=(3×3)/(8×3)=9/24 7/12=(7×2)/(12×2)