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30 tháng 10 2017

xe đó chở được số kg gạo là:

          18*50+15*20 = 1200 (kg)

đổi: 1200 kg = 12 tạ

                          đáp số: 12 tạ gạo.

30 tháng 10 2017

Đáp án là 12 tạ gạo nha bạn.

5 tháng 8 2017

xe đó chở số kg gạo là:

    (50x18)+20x15=1200(kg)

       Đổi :1200kg=12 tấn

            Đáp số:12 tấn

5 tháng 8 2017

12 tấn nha bạn chúc bạn học giỏi

14 tháng 10 2021

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

14 tháng 10 2021

Xe đó chở \(30\times40+40\times20=1200+800=2000\left(kg.gạo\right)=2\left(tấn.gạo\right)\)

19 tháng 11 2020

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

8 tháng 10 2022

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31 tháng 1 2016

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

20 tháng 11 2021
Lấy đâu ra 30;40
23 tháng 10 2021

Đổi: 2 tạ 50 kg = 2.5 tạ

Số gạo nếp xe chở là: 7/10 = 0.7 (tạ)

Số gạo tẻ xe chở là: 4/5 = 0.8 (tạ)

 

=> Số tạ ngô xe chở là: 2.5 - 0.8 - 0.7 = 1 (tạ)

23 tháng 10 2021

bài này chủ yếu giúp em ôn luyện về cách đổi đơn vị đo khối lượng: từ tạ sang kg

và đổi phân số thành số thập phân để thực hiện phép tính em nhé!

22 tháng 10 2017

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

22 tháng 10 2017

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.

7 tháng 4 2015

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)

7 tháng 4 2015

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)

 

21 tháng 10 2016

Đổi 2 tạ 50kg=250kg \(\frac{7}{10}\)tạ= 70 kg  \(\frac{4}{5}\)tạ= 80 kg

Xe đó chở số ngô là:

250-70-80=100(kg)

Đổi 100kg= 1 tạ

Đáp số: 1 tạ ngô

tk nhé

27 tháng 2 2020

Đổi 2 tạ 50kg=250kg 
10
7
tạ= 70 kg  
5
4
tạ= 80 kg
Xe đó chở số ngô là:
250-70-80=100(kg)
Đổi 100kg= 1 tạ