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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
Số kg gạo tẻ là:
50 x 32 = 1600 (kg)
Số kg gạo nếp là:
59 x 45 = 2655 (kg)
Vậy có tổng cộng:
1600 + 2655 = 4255(kg) = 4,255 tấn
ĐS: 4,255 tấn
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.
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
Xe đó chở \(30\times40+40\times20=1200+800=2000\left(kg.gạo\right)=2\left(tấn.gạo\right)\)
a) 30 bao gạo tẻ cân nặng 30 x 40 =1200 (kg)
40 bao gạo nếp cân nặng 40 x 20 = 800 (kg)
Khối lượng gạo xe đó chở là 1200 + 800 = 2000 (kg)
Đổi 2000kg = 2 tấn
b) Đổi 13km500m = 13500m
Hiệu số phần bằng nhau là 5 - 2 = 3 (phần)
Độ dài đoạn đường AC là 13500 : 3 x 2 = 9000 (m)
Độ dài đoạn đường CB là 13500 + 9000 = 22500 (m)
Độ dài đoạn đường AB là 9000 + 22500 = 31500 (m)
a) 30 bao gạo tẻ cân nặng 30 x 40 =1200 (kg)
40 bao gạo nếp cân nặng 40 x 20 = 800 (kg)
Khối lượng gạo xe đó chở là 1200 + 800 = 2000 (kg)
Đổi 2000kg = 2 tấn
b) Đổi 13km500m = 13500m
Hiệu số phần bằng nhau là 5 - 2 = 3 (phần)
Độ dài đoạn đường AC là 13500 : 3 x 2 = 9000 (m)
Độ dài đoạn đường CB là 13500 + 9000 = 22500 (m)
Độ dài đoạn đường AB là 9000 + 22500 = 31500 (m)
Giải :
45 tấn 5 tạ = 45,5 tấn
75 % = 3/4
Vì số gạo nếp = 3/4 số gạo tẻ nên số gạo nếp = 3/7 tổng 2 số gạo
Số gạo nếp trong kho là :
45,5 x 3/7= 19,5 ( tấn )
Số gạo tẻ trong kho là :
45,5 - 19,5 = 26 (tấn )
Đ/S:...................
đổi : 55% = \(\dfrac{55}{100}\) = \(\dfrac{11}{20}\)
Gạo nếp so với tổng số gạo là : 1 - \(\dfrac{11}{20}\) = \(\dfrac{9}{20}\)
gạo nếp so với gạo tẻ là : \(\dfrac{9}{20}\) : \(\dfrac{11}{20}\) = \(\dfrac{9}{11}\)
Sau khi nhập thì gạo tẻ nhiều hơn gạo nếp là:
3 + ( 20 - 18 ) = 5 (tấn )
số gạo tẻ lúc sau là : 5 : ( 11 - 9 ) x 11 = 27,5 ( tấn)
số gạo tẻ lúc đầu là : 27,5 - 20 = 7,5 (tấn)
số gạo nếp lúc đầu là : 7,5 - 3 = 4,5 (tấn)
đáp số : ...........
đổi : 55% = =
Gạo nếp so với tổng số gạo là : 1 - =
gạo nếp so với gạo tẻ là : : =
Sau khi nhập thì gạo tẻ nhiều hơn gạo nếp là:
3 + ( 20 - 18 ) = 5 (tấn )
số gạo tẻ lúc sau là : 5 : ( 11 - 9 ) x 11 = 27,5 ( tấn)
số gạo tẻ lúc đầu là : 27,5 - 20 = 7,5 (tấn)
số gạo nếp lúc đầu là : 7,5 - 3 = 4,5 (tấn)
Bạn tự đáp số nhé chúc bạn học tốt ☘☘☘