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

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)

 

Khối lượng của gạo tẻ :

     30 x 40 = 1200 ( kg )

Khối lượng cụa gạo nếp :

     40 x 20 = 800 ( kg )

Khối lượng mà xe đó chở :

     1200 + 800 = 2000 ( kg )

     2000 kg = 2 tấn

Đáp số : 2 tấn

số kg gạo tẻ tất cả là

40 x 30 = 1200 kg

số kg gạo nếu là

40 x 20 = 800 kg

có tất cả số kg là

1200 + 800 = 2000 kg 

đổi 2000 kg = 2 tấn,

có tất cả 2 tấn gạo

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

2 tháng 4 2015

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

7 tháng 11 2015

Số ki-lô-gam của 20 bao ngô là:

40x25=1000(kg)=1 tấn

Số ki-lô-gam gạo là:

50x20=1000(kg)=1 tấn

Xe đó chở số tấn gạo và ngô là:

1+1=2(tấn)

Đáp số:2 tấn

 

6 tháng 11 2016

đáp số là 2 tấn mình thử rồi