간편 한 방법 으로 계산 할 수 있다. 40 × 95 + 5 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 102 × 58 & 161 & nbsp; & nbsp; & nbsp; & nbsp; 11 × 203 - 3 (200 + 3) × 14 & nbsp; & nbsp; & nbsp; & nbsp; 125 + 4 × 95 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (7 × 125) × 8.

간편 한 방법 으로 계산 할 수 있다. 40 × 95 + 5 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 102 × 58 & 161 & nbsp; & nbsp; & nbsp; & nbsp; 11 × 203 - 3 (200 + 3) × 14 & nbsp; & nbsp; & nbsp; & nbsp; 125 + 4 × 95 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (7 × 125) × 8.

① 40 × 95 + 5 = 3800 + 5 = 3805; ② 102 × 58 - 16 & nbsp; = 102 × 58 × 58 - 58 × 2 = (102 - 2) × 58 = (102 - 2) × 58 = 58000; ③ 11 × 2033 = 2233 = 2233 = 2230; ④ (200 + 3) × × × 18 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; = 200 × 14 × 14 = 2803 × 14 = 2800 + 42 = 2842 = 2842; ⑤12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 / / / / / / / / / 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 / / / / / / / / 12 12 12 12 12 12 12 12 12 12 12 × (125 × 8) = 7 × 1000 = 7000.