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Ô tô chở số gạo nếp :
35x40%=14(tạ)
Ô tô đó chở số gạo tẻ :
35-14=21(tạ)
Đ/s:.......
xe đó chở được số kg gạo là:
18*50+15*20 = 1200 (kg)
đổi: 1200 kg = 12 tạ
đáp số: 12 tạ gạo.
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
Lời giải:
a. Hiệu số phần bằng nhau:
$3-1=2$ (phần)
Số gạo tẻ là: $60:2\times 3=90$ (kg)
Số gạo nếp là: $90-60=30$ (kg)
b.
Buổi sáng bán được: $(90+30)\times \frac{2}{3}=80$ (kg)
Số gạo tẻ bán được là: $(80+40):2=60$ (kg)
số gạo tẻ gấp 5 lần số gạo nếp có nghĩa là số gạo nếp bằng 1/5 số gạo tẻ
Số gạo tẻ hơn số gạo nếp số phần là:5-1=4(phần)
Vậy 80 kg đó tương ứng với 4 phần
Số gạo tẻ là :80:4*5=100(kg)
Số gạo nếp là :100-80=20(kg)
Đáp số : gạo nếp:20 kg
gạo tẻ :100kg
xe đó chở số kg gạo là:
(50x18)+20x15=1200(kg)
Đổi :1200kg=12 tấn
Đáp số:12 tấn
Khi chưa lấy ra thì số gạo tẻ sẽ có 5 phần . Và khi lấy đi 150 kg thì giảm chỉ còn 2 phần . Vậy 150 kg ứng với :
5 - 2 = 3 [ phần bằng nhau ]
Số kg gạo tẻ khi chưa lấy ra là :
150 : 3 x 5 = 250 [ kg ]
Số kg gạo tẻ khi lấy ra 150 kg là :
250 - 150 = 100 [ kg ]
Số kg gạo nếp là :
100 : 2 = 50 [ kg ]
Đáp số : .....
Giải
Tỉ số là: 4 : 1 = \(\dfrac{4}{1}\)
Hiệu số phần bằng nhau là: 4 - 1 = 3 (phần)
Gạo nếp có số bao là: 75 : 3 \(\times\) 1 = 25 (bao)
Gạo tẻ có số bao là: 75 + 25 = 100 (bao)
Đ/S: ...