. 5· (–12 + 4) =
4. –4· (–3)· (–3) =
5. –(–3)· (–3) =
6. 4· (4–2) =
7. –5· (–12+4) =
8. –4· (–2–3) – 1=
9. –1· (–2)+( –2)· ( –3)· (–1) =
10. 4 – 20:(–5) =
11. 25:(–5) – 1=
12. –3·(–2)·(–1) – 6:3 =
13. –10 – (–2)·(–1)·(–3) =
14. –3·(–4 +(–2)) =
15. 63:(4+5) –4·(5–3) =
16. – 2· (3 – 6) – 16:(6 – 10) =
17. 2·(– 4 + 1) + (8 – 1):7 =
18. –10·(– 1– 5) – (–5 – 3):(–2) =
19. 7·[6 –(–5)] – 4·(5 – 3) =
20. 10·[3–2·(5–4) –2·(4–2)] =
21. –3·{–6[2·(–3 – 4·(–5+4) – 2 + 3) – 7 – 7] + 4 – 3} =
22. {–34:[3·(–3 – 50:(–6 – 4) –12 + 3) – 7 + 11] + 5 – 1}:6 =
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