四、计算下面各题。
$600 - 120 ÷ 15 × 67$
$358 + (55 - 26) × 17$
$615 ÷ (24 + 17) + 45$
$[203 - (43 - 29)] ÷ 9$
$793 ÷ 61 + 432 - 276$
$308 ÷ [4 × (985 - 974)]$
$(240 + 65) ÷ 5 × 27$
$56 × [900 ÷ (720 ÷ 16)]$
$(432 + 48) ÷ (275 - 245)$
$23 × [630 ÷ (26 + 44)]$

1. $600 - 120 ÷ 15 × 67 = 64$
2. $358 + (55 - 26) × 17 = 851$
3. $615 ÷ (24 + 17) + 45 = 60$
4. $[203 - (43 - 29)] ÷ 9 = 21$
5. $793 ÷ 61 + 432 - 276 = 169$
6. $308 ÷ [4 × (985 - 974)] = 7$
7. $(240 + 65) ÷ 5 × 27 = 1647$
8. $56 × [900 ÷ (720 ÷ 16)] = 1120$
9. $(432 + 48) ÷ (275 - 245) = 16$
10. $23 × [630 ÷ (26 + 44)] = 207$