(224+200+270+230):4= 924:4=231
4. Tikuvchi bitta ko‘ylakni tikish uchun 3 m, ikkinchi ko‘ylakka 2 m 40 cm, uchinchisiga 3 m 20 cm, to‘rtinchisiga esa 3 m 40 cm mato sarfladi. Tikuvchi bitta ko‘ylak tikish uchun o‘rtacha qancha mato sarflagan?
(3+2,4+3,2,+3,4):4=12:4=3
5. Quyidagi sonlarning o‘rta arifmetigini hisoblang:
1) 12, 17, 18, 20, 28; (12+17+18+20+28):5=95:5=19
2) 260, 290, 200, 150; (260+290+200+150):4=900:4=225
3) 64, 32, 15, 7, 39, 303, 100, 60;
(64+32+15+7+39+303+100+60):8=620:8=
4) 10, 20, 30, 40, 50, 60, 70, 80, 90.
(10+20+30+40+50+60+70+80+90):9=450:9=50
6. Oshxonada har kuni baravardan 7 kun davomida 250 kg kartoshka, 160 kg karam va 80 kg boshqa sabzavotlar ishlatildi. Oshxonada har kuni o‘rtacha necha kilogramdan sabzavot ishlatilgan?
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