một xe chở 12300kg gồm gạo nếp và gạo tẻ, trong số đó gạo nếp bằng 1 phần 6 số gạo chở trên xe . hỏi trên xe chở mỗi loại gạo bao nhiêu kg
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Số túi gạo là x thì số tui nếp cũng là x như vậy khối lượng gạo và nếp là :
`15x+12x=945 `
` =>`Số lượng túi là `x=35` túi
Như vậy khối lượng gạo:
`15xx35=525kg `
Và khối lượng `12xx35=420kg`
Khối lượng của 30 bao gạo tẻ là:
30 x 40 = 1200 ( kg )
Khối lượng của 40 bao gạo nếp là:
40 x 20 = 800 ( kg )
Đổi : 1200 kg = 1,2 tấn
800 kg = 0,8 tấn
Xe đó chở được số tấn gạo là:
1,2 + 0,8 = 2 ( tấn )
Đáp số : 2 tấn gạo
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Số kg gạo tẻ là:
30.40=1200 (kg)
Số gạo nếp là:
40.20=800 (kg)
Xe chở số tấn gạo là:
800+1200=2000(kg)
2000 kg=2 tấn
Đáp số : 2 tấn
Đổi 2 tấn 250 tấn = 2250kg
Số gạo đó đc đóng vào số túi là:
2250: (20+10) = 75(túi)
Xe đó chở đc số gạo tẻ là:
20×75=1500(kg)
Xe đó chở được số gạo nếp là:
10×75=750(kg)
Đ/s:.....
mình chỉ biết câu 1 thôi :
lấy số bao gạo tẻ nhân với cân nặng của bao là 30 x 40 = 1200 kg.
sau đó ta cũng làm như cách kia là : 40 x 20 = 800 kg.
ta cộng 2 tích lại bằng : 1200 + 800 = 2000 kg
1.
30 bao gạo tẻ nặng số ki-lô-gam là :
40 x 30 = 1200 (kg)
40 bao gạo nếp nặng số ki-lô-gam là :
20 x 40 = 800 (kg)
Xe đó chở số gạo là :
1200 + 800 = 2000 (kg)
2000kg = 2 tấn
Đáp số : 2 tấn
2.
1 tạ 50kg = 150 kg
Sau khi bán đi 25kg mỗi loại thì hiệu số gạo vẫn không đổi .
Lúc đầu cửa hàng có số gạo tẻ là :
150 : (5-2) x 5 = 250 (kg)
Lúc đầu cửa hàng có số gạo nếp là :
250 - 150 = 100 (kg)
Đáp số : 250kg gạo tẻ
100kg gạo nếp
3.
a, \(\frac{41}{24}\)
b, \(\frac{194}{65}\)
Bài 3 mình ko chắc lắm.
xe đó chở số kg gạo là:
(50x18)+20x15=1200(kg)
Đổi :1200kg=12 tấn
Đáp số:12 tấn
Số gạo tẻ xe đó chở là:
40 x 30 = 1200 (kg)
Số gạo nếp xe đó chở là:
20 x 40 = 800 (kg)
Số gạo xe đó chở là:
1200 + 800 = 2000 (kg)
Đ/S: 2000 kg
Số gạo nếp là :
12300 : 6 x 1 = 2050 kg
Số gạo tẻ là :
12300 - 2050 = 10250 kg
Đáp số : Gạo nếp : 2050 kg ; Tẻ : 10250 kg
k mk nha
Số ki-lô-gam gạo nếp là:
12300 x \(\dfrac{1}{6}\)=2050 (kg)
Số ki-lô-gam gạo tẻ là:
12300 - 2050=10250 (kg)
Đáp số:2050 kg gạo nếp
10250 kg gạo tẻ