§. Natural va butun sonlar

A)0 B)3 C) 0 yoki3 D) shart yetarli emas

20. ifodaning x=5 va y=6 bo’lgandagi qiymatini toping.

A)–12 B)–10 C)11 D)–11

21. Agar bo’lsa, ifodaning qiymatini toping.

A)A+B B)2A C)0 D)2B

22. ifodaning m= 1va n=–1 bo’lgandagiqiymatini toping.

A)3 B)4 C)2 D)10

23. ifodaning a= 9 va b=3 bo’lgandagi qiymatini toping.

A)1 B)1/2 C)1/3 D) ¼

24. ifodani soddalashtiring.

A)4 B)8 C)16 D)5

25. ifodaning a= 1va b= 8 bo’lgandagi qiymatini toping.

A)1 B)2 C)3 D)0

26. ifodaning a= 1va b= 27 bo’lgandagi qiymatini toping.

A)1 B)2 C)3 D)0

27. Agar (a
A)2 B)3 C)5 D)10

28. Hisoblang.