1. ī() - 20 (ǸſϷ)

2. 5,6(ƽ) - 20

3. 50 15 + 30ø 1 - 30

4. 30 9 - 18

5. 8 - 8

6. ¾ 3 8 + 1 4 + 6ð 10 - 16

7. ̾ 5% - 20


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