147
725.
Do‘kondagi 12 tonna kartoshkaning 7
3
5
_
tonnasi sotildi. Do‘konda
qancha
kartoshka qoldi?
726.
Ayirmani toping:
a) 5
2
3
_
– 1
3
_
;
d) 4 57
_
–
3
7
_
;
f)
2
3
5
_
–
3
5
_
;
b) 7 58
_
– 18
_
;
e) 10 8
9
_
–
2
9
_
;
g) 1
3
4
_
– 14
_
.
727.
Ayirmani toping:
a)
6
3
4
_
– 2 14
_
;
d)
3
2
5
_
– 1 15
_
;
f) 7
3
5
_
–
3
5
_
;
b) 4 78
_
– 2 18
_
;
e)
9
2
11
__
– 8 1
11
__
;
g) 4
2
5
_
– 4 15
_
.
Namuna:
Yuqorida yechilgan 2- misol.
728.
Ayirmani toping:
a) 1 5
9
_
– 8
9
_
;
b) 1 1
12
__
– 5
12
__
;
d) 8
3
7
_
– 5 57
_
;
e) 4 18
_
– 1 58
_
.
Namuna:
Yuqorida yechilgan 4- misol.
729.
Rasmlarni to‘ldiring va ular yordamida ayirmani toping.
3 – 1
3
4
_
= 2 4
_
– 1
3
4
_
= _________________.
4 1
3
_
– 2
2
3
_
= 3
3
_
– 2
2
3
_
= _________________.
730.
Daryo oqimining tezligi
2
3
4
_
km/soat, qayiqning turg‘un suvdagi tezligi esa
14 14
_
km/soat. Qayiqning oqimga qarshi tezligini toping.
731.
To‘g‘ri to‘rtburchakning eni 1
2
5
8
_
sm, bo‘yi esa undan 7
3
8
_
sm uzun. To‘g‘ri
to‘rtburchakning bo‘yini toping.
732.
Amallarni bajaring:
a) 5 5
9
_
+ 2 8
9
_
;
d) 7 1
12
__
– 4 5
12
__
;
f) 8
3
7
_
+ 5 57
_
;
h) 4 18
_
– 1 58
_
;
b) 5 5
9
_
– 8
9
_
;
e) 7 11
12
__
+ 4 5
12
__
;
g) 8 – 5 57
_
;
i) 6 1
22
__
– 2 5
22
__
.
148
733.
To‘g‘ri to‘rtburchakning eni 12
5
8
_
sm, bo‘yi esa undan 7
3
8
_
uzun. To‘g‘ri to‘rt-
burchakning bo‘yini toping.
734.
Rasmdan
foydalanib, aralash sonlar ustida amallarni bajaring:
a)
b)
d)
е)
2
1
4
_
+ 1
2
4
_
=
4
3
4
_
– 3
2
4
_
=
2
1
2
_
+ 3 =
3
5
6
_
–
3
6
_
=
735.
Ifodaning qiymatini toping:
a) 5 5
9
_
+ 2 1
9
_
+ 1
2
9
_
;
d) 7 1
3
_
+ 4 1
3
_
+
2
3
_
;
f) 8
3
8
_
+ 5 58
_
– 2 78
_
;
b) 8
5
11
__
– 3
8
11
__
+ 4
9
11
__
; e) 5
11
21
__
+ 4
5
21
__
– 6
7
21
__
;
g) 8
3
7
_
– 3 57
_
– 2
6
7
_
.
736.
Namunaga ko‘ra ayirmani toping va hisoblash usulini tushuntiring:
a) 3 5
9
_
– 7
9
_
;
b) 4
8
15
__
– 14
15
__
;
d) 9
1
19
__
– 2
18
19
__
;
e) 5
19
53
__
– 3
36
53
__
.
Namuna:
a) 7
9
_
= 1 –
2
9
_
ekanligidan foydalanamiz. Oldin ayriluvchini unga
eng yaqin turgan butun son (1) bilan almashtiramiz va ayirma o‘zgarmasligi
uchun
2
9
_
ni qo‘shib qo‘yamiz: 3 5
9
_
–
7
9
_
=
(3 5
9
_
–
1)
+
2
9
_
=
2
5
9
_
+
2
9
_
=
2
5 + 2
9
____
=
2
7
9
_
.
737.
To‘g‘ri to‘rtburchakning eni 4
5
11
__
dm, bo‘yi esa 6
7
11
__
dm. To‘g‘ri to‘rtburchakning
perimetrini toping.
+
+
+
=
=
–
=
=
.
.
.
.
149
Uyda bajariladigan mashqlar
738.
Yig‘indini toping.
a)
3
1
11
__
+ 2
3
11
__
;
b)
6
5
7
_
+ 9 17
_
;
d)
3
7
13
__
+ 2 5
13
__
.
739.
Yig‘indini toping.
a) 5 1
3
_
+
2
3
_
;
b) 57
_
+ 1
2
7
_
;
d) 5 15
_
+ 2 45
_
;
e) 1
3
4
_
+ 5 14
_
.
740.
Yig‘indini toping.
a) 4
9
_
+
2
9
_
+ 1;
b) 4
11
__
+ 3 +
3
11
__
;
d) 1 5
12
__
+ 1
12
__
+ 1
12
__
;
e) 12 + 5
6
_
+ 1
6
_
.
741.
Yig‘indini toping.
a) 3
8
17
__
+ 2
13
17
__
;
b) 6
9
14
__
+ 2
13
14
__
;
d) 1 57
_
+ 1
6
7
_
;
e) 5 78
_
+ 3
3
8
_
.
Namuna:
Yuqorida yechilgan 2- misol.
742
Ayirmani toping:
a) 1 – 15
_
;
b) 2 – 18
_
;
d) 3 – 5
6
_
;
e) 7 –
3
7
_
.
743.
Ayirmani toping:
a) 5 14
_
– 3;
b) 11
3
8
_
– 5;
d)
3
5
8
_
– 2.
744.
Ayirmani toping:
a) 5 – 1
2
3
_
;
b) 11 – 7
11
15
__
;
d) 12 – 8 58
_
;
e) 3 – 1
13
14
__
.
745.
Daryo oqimining tezligi 2 57
_
km/soat, qayiqning turg‘un
suvdagi tezligi
15
3
7
_
km/soat. Qayiqning oqim bo‘ylab tezligini toping.
746.
Ayirmani toping:
a)
6
2
7
_
– 17
_
;
b) 5
5
11
__
–
2
11
__
;
d)
3
7
12
__
– 7
12
__
.
747.
Ayirmani toping:
a)
3
3
5
_
– 2 15
_
;
b) 13
8
15
__
– 1 7
15
__
;
d) 4 47
_
– 1
2
7
_
.
748.
Ayirmani toping:
a) 5
6
13
__
–
9
13
__
;
b)
9
3
14
__
– 5
14
__
;
d) 12
13
23
__
– 5
21
23
__
;
e)
3
67
83
__
– 1
75
83
__
.
150
749.
Do‘kondagi 15 tonna kartoshkaning
3
5
8
_
tonnasi sotildi. Do‘konda qancha
kartoshka qoldi?
750.
To‘g‘ri to‘rtburchakning bo‘yi 5
5
13
__
dm, eni esa undan
2
7
13
__
dm qisqa. To‘g‘ri
to‘rtburchakning enini toping.
751.
Amallarni bajaring:
a) 4 57
_
+ 3
6
7
_
;
b) 7 1
13
__
– 5 5
13
__
;
d) 1812
17
__
+ 515
17
__
;
e) 24 5
9
_
– 21 7
9
_
.
752.
Ifodaning qiymatini toping:
a) 1 57
_
+ 2
3
7
_
+ 1 47
_
;
b) 13 47
_
+ 5 57
_
– 2
6
7
_
;
d) 5 15
_
– 3
3
5
_
+ 4 45
_
;
e) 7
11
16
__
+ 2
5
16
__
– 8
7
16
__
;
f) 24
1
15
__
– 12
4
15
__
– 2
3
15
__
;
g) 8
2
5
_
– 1 45
_
– 2
3
5
_
.
753.
Uchburchakning tomonlari 15 8
10
__ dm, 2 9
10
__ dm va
11 1
10
__
dm. Uning perimetrini
toping.
Qiziqarli matematikaga oid masalalar
Shakllar ma’lum qonuniyat asosida qatorga joylashtirilgan.
Qatorning
navbatdagi shaklini chizing.
151
V BOBNI TAKRORLASHGA DOIR MASALALAR
34- §
754.
1 t bug‘doydan 780 kg un, 25 kg yorma, 195 kg kеpak olinadi. 50 t bug‘doydan
qancha un, yorma va kepak olinadi?
755.
a) Toshkent teleminorasining balandligi 375 m.
Teleminora poydevori
balandligi uning 33 dan 1 qismini tashkil qiladi. Poydevor balandligini toping.
b) Toshkent teleminorasini uzunligi 93 m bo‘lgan oyoqlar ushlab turadi.
Oyoqlar minora balandligining qanday qismini tashkil qiladi?
756.
Quyidagi rasmlarda doiraning oltidan bir ulushlari berilgan. Ularni kasr
ko‘rinishida ifodalang. Bu kasrlarning qaysilari 1 ga teng? 1 dan katta?
1 dan kichik?
a)
e)
f)
b)
d)
757.
Rasmga qarab
AB
,
CD
va
EF
kesmalarning har biri boshqalarining qanday
qismini tashkil qilishini toping:
758.
Agar ikkita katak 1 ni ifodalayotgan bo‘lsa, quyidagi shakllar qanday sonni
ifodalayapti?
a)
g)
h)
i)
b)
d)
e)
f)
152
759.
Dilnoza 168 betlik matnning yettidan to‘rt qismini kompyuterda terdi. U
matnning necha betini kompyuterda tergan?
Yana necha betlik matn
qolgan?
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