8
2.
Guruhlab qo‘shing:
12 0+ 80 + 20
220+ 46 0+ 40
530 + 120 + 70
14 0+ 90 + 60 350 + 17 0+ 50 280 + 320 + 210
3.
To‘g‘ri to‘rtburchakning bo‘yi 72 cm, eni bo‘yidan
27 cm qisqa. To‘rtburchakning perimetrini toping.
4.
7 ·
x
= 63 48 :
x =
6 54
:
x =
9
5.
Rasm asosida masala tuzing va yeching:
6.
Qulay usulda qo‘shing:
520 + 240 + 180 370 + 270 + 230
260 + 130 + 340 410 + 280 + 190
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