7. 15:50 15:3 24:30 19:2 4 дм 47 см 5 мм 1 см 1+8 1.8 6+0 6-0

1. $$15 : 5 = 3$$
2. $$15 : 3 = 5$$
3. $$24 : 3 = 8$$
4. $$19 : 2 = 9,5$$
5. $$4 \text{ дм} = 40 \text{ см} < 47 \text{ см}$$
6. $$5 \text{ мм} < 1 \text{ см} = 10 \text{ мм}$$
7. $$1 + 8 = 9$$
8. $$1.8 = 1,8$$
9. $$6 + 0 = 6$$
10. $$6 - 0 = 6$$

Ответ: 3, 5, 8, 9.5, 40 < 47, 5 < 10, 9, 1.8, 6, 6