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OP
2
PD
20 tháng 12 2021
Trung bình mỗi con nặng số ki-lô-gam là:
12,5 : 5 = 2,5 (kg)
Đáp số 2,5 kg
#hoctot
10 tháng 10 2015
Hai gà , hai vịt , hai ngan nặng số kg là :
5 + 9 + 10 = 24 ( kg )
TBC mỗi con nặng là :
12 : 3 = 4 ( kg )
20 tháng 7 2021
Giải
Trung bình cộng mỗi con nặng là :
( 5 + 9 + 10 ) : 2 : 3 = 4 ( kg )
Đ/s ......... ( 100% ko sai )
27 tháng 6 2015
nếu 1 con ngan và một con gà nặng 9kg mà 1 con ngan và vịt lại nặng 10kg thì vịt hơn gà 1 kg
Con gà có cân nặng là :
(5 - 1) : 2 = 2 kg
Trung bình mỗi con nặng là :
( 2 + 10) :3 = 4 kg
Đáp số : 4kg
30 tháng 6 2017
Trung bình mỗi con nặng:
( 5 + 9 + 10 ) : 3 = 8 ( kg )
Đ/s: …
~ Chúc bạn học tốt ~
30 tháng 6 2017
Giải :
Trung bình mỗi con nặng là :
( 5 + 9 + 10 ) : 3 = 8 ( kg )
Đ/s .......
Tk nhé
Chúc bn hok giỏi
3 tháng 7 2016
Gọi khối lượng Gà Ác, Vịt Xiêm, Ngan Trắng lần lượt là a,b,c kg(a,b,c>0)
Theo bài ra ta có:
a+b=5
a+c=9
b+c=10
=>a+b+a+c+b+c=5+9+10
=>2x(a+b+c)=24
=>a+b+c=24:2=12
=>c=(a+b+c)-(a+b)=12-5=7(kg)
b=(a+b+c)-(a+c)=12-9=3(kg)
a=(a+b+c)-(b+c)=12-10=2(kg)
Vậy khối lượng của Gà Ác, Vịt Xiêm, Ngan Trắng lần lượt là 2kg;3kg;7kg
3 tháng 7 2016
Tổng số cần nặng của 3 con :
( 5 + 9 + 10 ) : 2 = 12 ( kg )
Trung bình mội con cân nặng là:
12 : 3 = 4 ( kg )
Đáp số: 4 kg
30 tháng 3 2016
theo đề ra ta có
1 con vịt + 1 con gà = 5 kg (1)
1 con gà + 1 con ngỗng = 9 kg (2)
1 con ngỗng + 1 con vịt = 10 kg (3)
từ 1 và 2 => 1 con ngỗng hơn 1 con vịt là 4 kg
con vịt nặng số kg là ( 10 - 4 ) : 2 = 3 kg
con ngỗng nặng số kg là 10 - 3 = 7 kg
con gà nặng số kg là 5 - 3 = 2 kg
vậy trung bình 1 con nặng số kg là
( 3 + 7 + 2 ) : 3 = 4 (kg)
đáp số : 4 kg
4 tháng 2 2016
Hình như giải như thế này:
Cả ba con nặng là:
(5 + 9 + 10) : 2 = 12 (kg)
Trung bình cộng của ba con là:
12 : 3 = 4 (kg)
Đáp số: 4 kg.
1 tháng 5 2016
Ta thấy cả ba con vật đều được lặp lại 2 lần.
Tổng số kg của 3 con vật là:
(5 + 9 + 10) : 2 = 12 (kg)
Trung bình cân nặng của mỗi con vật là:
12 : 3 = 4 (kg)
Đ/s: 4 kg
VH
26 tháng 1 2016
trung bình một con vịt hơn con gà là
3,7-2,9=0,8(kg)
có số con gà , con vịt là
12:0,8=15(con)
đáp số 15 con
Trung bình mỗi con nặng là:
12,5 : 5 = 2,5 ( kg )
Đáp số: 2,5 kg.
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