44kk44

정말 감사합니다

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7.?1/2＋1/4×4/5－1/8

8.?3/4×5/7×4/3-1/2

9.?23-8/9×1/27¶1/27

10 . ?8×5/6＋2/5¶4

11, ?1/2＋3/4×5/12×4/5

12, ?8/9×3/ 4 -3/8¶3/4

13、?5/8¶5/4＋3/23¶9/11