3kg+7hg= hg 4kg+9hg= hg 6hg+300g= g 8hg+100g= g 7hg+45g= g 5hg+140g= g 8kg -17hg= hg 15kg - 65hg= hg 6hg - 400g= g 20hg - 700g= g

3 kg + 7 hg = 37 hg
4 kg + 9 hg = 49 hg
6 hg + 300 g = 900 g
8 hg + 100 g = 900 g
7 hg + 45 g = 735 g
5 hg + 140 g = 640 g
8 kg - 17 hg = 63 hg
15 kg - 65 hg = 85 hg
6 hg - 400 g = 200 g
20 hg - 700 g = 1.300 g