2–bob. Butun va ratsional sonlar butun sonlar ustida amallar

9. KASRLI IFODALAR

1. Agar A, B, C va D sonlarning nisbati 2:3:4:5 kabi bo’lsa, ning qiymatini toping.

A) B) C) D)

2. a b c=5 bo’lsa, ko’paytmaning qiymatini toping.

A) B) C) 1 D)

3. n ning nechta butun qiymatida kasr butun son bo’ladi?

A) 2 B) 6 C) 4 D) 3

4. ifoda n ning nechta butun qiymatida natural son bo’ladi?

A) 3 B) 6 C) 8 D) 4

5. ifoda natural son bo’ladigan n ning barchga natural qiymatlari yig’indisini toping.

A) 61 B) 54 C) 44 D) 50

6. va yig’indi butun son bo’lsa, quyidagilardan qaysi biri noto’g’ri?

A) n soni 6 ga bo’linadi B) n soni 3 ga bo’linadi C) n soni 2 ga bo’linadi D) n>84

7. Agar bo’lsa, ni n orqali ifodalang.

A) 3 n B) 6 n C) 3 n D) 6 n

8. Hisoblang: .

A) 1 B) C) D)

9. Agar [m]=[n] bo’lsa, u holda m va n haqiqiy sonlar uchun qanday munosabat doim o’rinli? (Bu yerda [] va {} belgilar mos ravishda sonning butun va kasr qismi)

A) m n={m} {n} B) m n= 1 C) m n D) m, n

10. ifoda natural qiymatlar qabul qiladigan a ning barcha qiymatlari yig’indisini toping.

A) 22 B) 10 C) 9 D) 3

11. a=4, b=3, c=2 bo’lsa,

ni hisoblang.

A) 8 B) C) D)