請列直式作計算，或列式確實地做計算
1. -1 + 1 =
2. 563 – 4979 =
3. -27993 + 304686 =
4. 53 + 7 – 28 – 220 + 5991 =
5. 280 – 10000 – 2173 + 6657 + 83226 =
6. -1 × 1 =
7. 10 × 10000 =
8. -260 × 5300 =
9.
8322 × 99 =
10. -2 × -(-(-(-(-30)))) × -1 =
11. –( 2 × -33) × -(-(1)) × (-(-( -55 × -(-3)))) =
12. 58000000 ÷ 29000 =
13. 9453 ÷ 23 =
14. 5184 ÷ 72 =
15. -237600 ÷ 300 =
16. -2289 ÷ -109 =
17.
51 ÷ -23 × 69 ÷ -17 =
18. 3366168 ÷ -10789 × 2 ÷ 156 =
19. 88888888 ÷ -1111 × -10 =
20. -100000000 × 10 ÷ -100000 ÷ -1000 × 10000000 × 0 =