| | | | | | ⒈ | | 3 4 4 6 40 | 60 | ⑴ | | | ⑵ | | | | 20cm | | 3 10cm 6 | | 15 24cm | | 1 1.5cm | | 5 7 | ⑶ | 2 4 5 15 | 20cm | | | 10 | 667 | 10 15 5 7 | | ⑷ | | | 30 | ⒉ | 4 7 | | ⑴ | | 2 | ⑵ | | | | | | | ⑶ | 2 3 | 4 5 1 2 | | 667 15 — 20 | | ⑷ | | | |