① 14+(21-19)×14 ② 736÷(43-20)×23 ③ (227+11)÷(31-14) ④ (31-154÷11)×12 ⑤ (1369-37)÷37-32 ⑥ 234÷(205-199) ⑦ (75+315)÷(35-20) ⑧ (121-92)×12÷6 ⑨ 178-(83＋360÷60) ⑩ (420+60)÷(275-245) 11 (60+10)÷(17-10) 12 17+(233-43)÷10 13 22+(374-10)÷26 14 (245-11)÷18-11 15 22-(10+100÷10) 16 (252-14)÷17-10
17 (346-10)÷16-12 18 215-198÷(121÷11) 19 (45-651÷21)×33 20 (714-12)÷27-19
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