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19 tháng 11 2016

1﴿chiều rộng là: 78,2‐3,8=74,4

HCN=﴾78,2+74,4﴿*2=305,2

2﴿1 tấn gạo và 1 tấn ngô

3﴿2 số đó là: 27; 9,36

17 tháng 11 2016

1)chiều rộng là: 78,2-3,8=74,4

HCN=(78,2+74,4)*2=305,2

2)1 tấn gạo và 1 tấn ngô

3)2 số đó là: 27; 9,36

7 tháng 6 2021

20 bao gạo nặng là:

 50x20= 1000(kg)

25 bao ngô nặng là:

 40x 25= 1000( kg)

Xe đó chở số gạo là:

1000+1000= 2000(kg)

 Đổi: 2000kg= 2 tấn

    Đáp số: 2 tấn

Bài này ko phải lớp 5 đâu mà là của lớp 3 đấy

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 

9 tháng 11 2021

30 bao ngô nặng : 30 x 60 =1800 (kg)

25 bao gạo nặng: 25 x 50=1250 (kg)

xe đó chở được : 1800+1250=3050kg = 3,05( tấn)

16 tháng 10 2021

có 48 cá bảnh chia đều ra 8 hộp .Hồi 115 chia đều ra mấy hộp

Bạn có thể trình bày cách giải được không ạ?

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
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.