Sana: 201 y. Mavzu: berilgan sonning berilgan protsentini topish darsning maqsadi

3. Yangi mavzuni yoritish:
Sonning moduli

Sonning moduli deb koordinata o’qida sanoq boshidan shu songa mos keluvchi nuqtagacha bo’lgan masofaga aytiladi.

Sonning moduli sonning absolut qiymati ham deyiladi. a sonning moduli |a| kabi belgilanadi.

Musbat sonning moduli shu sonning o’ziga teng.

Musbat sonning moduli unga qarama-qarshi musbat songa teng.

0 sonining moduli 0 ga teng: |0|=0
Qarama-qarshi sonlarning modullari o’zaro teng bo’ladi.


571. Quydagi sonlarning modullarini toping va javobni tenglik ko’rinishida yozing hamda hosil bo’lgan natijani o’qing:
1) -6; 44; -150; 75; -7,8; 2) -5,2; 3,8; -0,75; -1 ; -0,45.
572. Sanoq boshi O nuqtadan: 1) A(-7,5); 2) B(-2,75); 3) C(4,4); 4) D(-7,2) nuqtagacha bo’lgan masofani toping.
573. Modullari: 1,6; -13; 47; 0; ; -15; -3,4 ga teng bo’lgan sonlar bormi? Agar bor bo’lsa, ularni yozib chiqing.
Tenglamani yeching (574-575):
574. 1) |x-6|=0; 2) |-x|=7;
3) |x|-4=0; 4) |x|=10.
575. 1) –x=3,14; 2) x=-3,14
3) -8,09=-x 4) -8,09=x.
576. Agar: a=-3,05; 10,5; -0,73; 55 bo’lsa, -a va |a| ni toping.
577. Hisoblang:
1) |-15|+|-10|-|-3||-5|; 3) |-19|-|-11|+4|-5|;
2) |-32|+|-32|:|-8|-|-4|; 4) |-21|+7|-3|-|-25|.
578. a, b, c – musbat sonlar; x, y, z – manfiy sonlar ekani ma’lum bo’lsa, tenglikni oxirigacha yetkazing:
|a|=...; |b|=...; |c|=...; |x|=...; |y|=...; |z|=... .
579. Sonlarning modullarini toping, javobni tenglik ko’rinishida yozing:
1) -25; 34; -53; -100; -65; 2) -8,9; 7,5; ; ; -5,7.
580. Yig’indini hisoblang:
1) |-6|+|9|; 3) |-6,5|+|-9,5|;
2) |-3,7|-|-1,7|; 4) |91|-|-11|;
5) |32,1|-|-12,1|; 6) |-0,7|-|-0,7|.
581. Hasan bir son o’yladi. U o’ylagan sonning moduli:
1) -23,2; 2) 0,37; 3) 0; 4) -2001; 5) 0,5; 6) 1,05.
Ning moduli bilan bir xil. Hasan o’ylagan sonlarni toping.