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$600 - 120 ÷ 15 × 67$ $358 + (55 - 26) × 17$
$615 ÷ (24 + 17) + 45$ $[203 - (43 - 29)] ÷ 9$
$(4 + 26) × 76 - 387$ $125 + 237 - 725 ÷ 25$
$793 ÷ 61 + 432 - 276$ $308 ÷ [4 × (985 - 974)]$
$49 + 731 ÷ (21 - 4)$ $48 × [213 - (32 + 148)]$
$254 - 120 ÷ 8 + 56$ $(240 + 65) ÷ 5 × 27$
$74 × [75 ÷ (31 - 16)]$ $83 × (8 + 12) - 563$
$68 × (708 ÷ 12) - 389$ $56 × [900 ÷ (720 ÷ 16)]$
$(432 + 48) ÷ (275 - 245)$ $23 × [630 ÷ (26 + 44)]$
$500 - 48 × 16 ÷ 32$ $560 ÷ [(205 - 198) × 4]$
$615 ÷ (24 + 17) + 45$ $[203 - (43 - 29)] ÷ 9$
$(4 + 26) × 76 - 387$ $125 + 237 - 725 ÷ 25$
$793 ÷ 61 + 432 - 276$ $308 ÷ [4 × (985 - 974)]$
$49 + 731 ÷ (21 - 4)$ $48 × [213 - (32 + 148)]$
$254 - 120 ÷ 8 + 56$ $(240 + 65) ÷ 5 × 27$
$74 × [75 ÷ (31 - 16)]$ $83 × (8 + 12) - 563$
$68 × (708 ÷ 12) - 389$ $56 × [900 ÷ (720 ÷ 16)]$
$(432 + 48) ÷ (275 - 245)$ $23 × [630 ÷ (26 + 44)]$
$500 - 48 × 16 ÷ 32$ $560 ÷ [(205 - 198) × 4]$
答案
1.64 2.851 3.60 4.21 5.1893 6.333 7.169 8.7 9.92 10.1584 11.295 12.1647 13.370 14.1097 15.3623 16.1120 17.16 18.207 19.476 20.20
解析
1. $600 - 120 ÷ 15 × 67$
$\begin{aligned}&=600 - 8 × 67\\&=600 - 536\\&=64\end{aligned}$
2. $358 + (55 - 26) × 17$
$\begin{aligned}&=358 + 29 × 17\\&=358 + 493\\&=851\end{aligned}$
3. $615 ÷ (24 + 17) + 45$
$\begin{aligned}&=615 ÷ 41 + 45\\&=15 + 45\\&=60\end{aligned}$
4. $[203 - (43 - 29)] ÷ 9$
$\begin{aligned}&=[203 - 14] ÷ 9\\&=189 ÷ 9\\&=21\end{aligned}$
5. $(4 + 26) × 76 - 387$
$\begin{aligned}&=30 × 76 - 387\\&=2280 - 387\\&=1893\end{aligned}$
6. $125 + 237 - 725 ÷ 25$
$\begin{aligned}&=125 + 237 - 29\\&=362 - 29\\&=333\end{aligned}$
7. $793 ÷ 61 + 432 - 276$
$\begin{aligned}&=13 + 432 - 276\\&=445 - 276\\&=169\end{aligned}$
8. $308 ÷ [4 × (985 - 974)]$
$\begin{aligned}&=308 ÷ [4 × 11]\\&=308 ÷ 44\\&=7\end{aligned}$
9. $49 + 731 ÷ (21 - 4)$
$\begin{aligned}&=49 + 731 ÷ 17\\&=49 + 43\\&=92\end{aligned}$
10. $48 × [213 - (32 + 148)]$
$\begin{aligned}&=48 × [213 - 180]\\&=48 × 33\\&=1584\end{aligned}$
11. $254 - 120 ÷ 8 + 56$
$\begin{aligned}&=254 - 15 + 56\\&=239 + 56\\&=295\end{aligned}$
12. $(240 + 65) ÷ 5 × 27$
$\begin{aligned}&=305 ÷ 5 × 27\\&=61 × 27\\&=1647\end{aligned}$
13. $74 × [75 ÷ (31 - 16)]$
$\begin{aligned}&=74 × [75 ÷ 15]\\&=74 × 5\\&=370\end{aligned}$
14. $83 × (8 + 12) - 563$
$\begin{aligned}&=83 × 20 - 563\\&=1660 - 563\\&=1097\end{aligned}$
15. $68 × (708 ÷ 12) - 389$
$\begin{aligned}&=68 × 59 - 389\\&=4012 - 389\\&=3623\end{aligned}$
16. $56 × [900 ÷ (720 ÷ 16)]$
$\begin{aligned}&=56 × [900 ÷ 45]\\&=56 × 20\\&=1120\end{aligned}$
17. $(432 + 48) ÷ (275 - 245)$
$\begin{aligned}&=480 ÷ 30\\&=16\end{aligned}$
18. $23 × [630 ÷ (26 + 44)]$
$\begin{aligned}&=23 × [630 ÷ 70]\\&=23 × 9\\&=207\end{aligned}$
19. $500 - 48 × 16 ÷ 32$
$\begin{aligned}&=500 - 768 ÷ 32\\&=500 - 24\\&=476\end{aligned}$
20. $560 ÷ [(205 - 198) × 4]$
$\begin{aligned}&=560 ÷ [7 × 4]\\&=560 ÷ 28\\&=20\end{aligned}$
$\begin{aligned}&=600 - 8 × 67\\&=600 - 536\\&=64\end{aligned}$
2. $358 + (55 - 26) × 17$
$\begin{aligned}&=358 + 29 × 17\\&=358 + 493\\&=851\end{aligned}$
3. $615 ÷ (24 + 17) + 45$
$\begin{aligned}&=615 ÷ 41 + 45\\&=15 + 45\\&=60\end{aligned}$
4. $[203 - (43 - 29)] ÷ 9$
$\begin{aligned}&=[203 - 14] ÷ 9\\&=189 ÷ 9\\&=21\end{aligned}$
5. $(4 + 26) × 76 - 387$
$\begin{aligned}&=30 × 76 - 387\\&=2280 - 387\\&=1893\end{aligned}$
6. $125 + 237 - 725 ÷ 25$
$\begin{aligned}&=125 + 237 - 29\\&=362 - 29\\&=333\end{aligned}$
7. $793 ÷ 61 + 432 - 276$
$\begin{aligned}&=13 + 432 - 276\\&=445 - 276\\&=169\end{aligned}$
8. $308 ÷ [4 × (985 - 974)]$
$\begin{aligned}&=308 ÷ [4 × 11]\\&=308 ÷ 44\\&=7\end{aligned}$
9. $49 + 731 ÷ (21 - 4)$
$\begin{aligned}&=49 + 731 ÷ 17\\&=49 + 43\\&=92\end{aligned}$
10. $48 × [213 - (32 + 148)]$
$\begin{aligned}&=48 × [213 - 180]\\&=48 × 33\\&=1584\end{aligned}$
11. $254 - 120 ÷ 8 + 56$
$\begin{aligned}&=254 - 15 + 56\\&=239 + 56\\&=295\end{aligned}$
12. $(240 + 65) ÷ 5 × 27$
$\begin{aligned}&=305 ÷ 5 × 27\\&=61 × 27\\&=1647\end{aligned}$
13. $74 × [75 ÷ (31 - 16)]$
$\begin{aligned}&=74 × [75 ÷ 15]\\&=74 × 5\\&=370\end{aligned}$
14. $83 × (8 + 12) - 563$
$\begin{aligned}&=83 × 20 - 563\\&=1660 - 563\\&=1097\end{aligned}$
15. $68 × (708 ÷ 12) - 389$
$\begin{aligned}&=68 × 59 - 389\\&=4012 - 389\\&=3623\end{aligned}$
16. $56 × [900 ÷ (720 ÷ 16)]$
$\begin{aligned}&=56 × [900 ÷ 45]\\&=56 × 20\\&=1120\end{aligned}$
17. $(432 + 48) ÷ (275 - 245)$
$\begin{aligned}&=480 ÷ 30\\&=16\end{aligned}$
18. $23 × [630 ÷ (26 + 44)]$
$\begin{aligned}&=23 × [630 ÷ 70]\\&=23 × 9\\&=207\end{aligned}$
19. $500 - 48 × 16 ÷ 32$
$\begin{aligned}&=500 - 768 ÷ 32\\&=500 - 24\\&=476\end{aligned}$
20. $560 ÷ [(205 - 198) × 4]$
$\begin{aligned}&=560 ÷ [7 × 4]\\&=560 ÷ 28\\&=20\end{aligned}$
