2、0

3,2 and 1/3

The denominator remains the same, only the numerator is added.

5、35/72

6.20×3/8= 15/2 (kg)

7.18/1× 7/9 =14/11(m)

8,9/10×1/3 = 3/10 (length)

9/ 10×2/9= 1/5 (length)

9/ 10×4/9=2/5 (length)

I wish you progress in your study!