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6 tháng 8 2017

Xe thứ nhất chở số kg gạo là:

5x80=400(kg)

Xe thứ hai chở số kg gạo là:

3x96=288(kg)

Trung bình mỗi xe chở số kg gạo là:

(400+288):2=344(kg)

b,Cả hai xe chở số bao gạo la:

5+3=8(bao)

Trung bình mỗi bao gạo nặng số kg là:

688:8=86(kg)

28 tháng 11 2015

HUỲNH HƯƠNG LƯU sai b phải = 88 chứ

15 tháng 1 2017

Vì xe thứ hai chở ít hơn xe thứ nhất 3 bao gạo thì xe thứ hai chở ít hơn xe thứ nhất 150kg gạo, nên 3 bao gạo sẽ nặng 150kg.

1 bao gạo nặng số kg là:  150 : 3 = 50 ﴾kg﴿

Xe thứ nhất chở số kg gạo là: 50 x 60 = 3000 ﴾kg﴿

Xe thứ hai chở số kg gạo là: 3000 ‐ 150 = 2850 ﴾kg﴿

Đáp số: Xe thứ nhất: 3000kg; Xe thứ hai: 2850kg

15 tháng 1 2017

Xe thứ nhất chở nhiều hơn xe thứ hai số bao gạo là :

60 - 57 = 3 ( bao )

Mỗi bao gạo nặng :

150 : 3 = 50 ( kg )

Xe thứ nhất chở số gạo là :

50 x 60 = 3000 ( kg )

Xe thứ hai chở số kg gạo là :

3000 - 150 = 2850 ( kg )

Đáp số : xe 1 : 3000 kg

             xe 2 : 2850 kg 

2 tháng 11 2015

Vì xe thứ hai chở ít hơn xe thứ nhất 3 bao gạo thì xe thứ hai chở ít hơn xe thứ nhất 150kg gạo, nên 3 bao gạo sẽ nặng 150kg.

1 bao gạo nặng số kg là: 

150 : 3 = 50 (kg)

Xe thứ nhất chở số kg gạo là:

50 x 60 = 3000 (kg)

Xe thứ hai chở số kg gạo là:

3000 - 150 = 2850 (kg)

Đáp số: Xe thứ nhất: 3000kg; Xe thứ hai: 2850kg.

2 tháng 11 2015

Vì xe thứ hai chở ít hơn xe thứ nhất 3 bao gạo thì xe thứ hai chở ít hơn xe thứ nhất 150kg gạo, nên 3 bao gạo sẽ nặng 150kg.

1 bao gạo nặng số kg là: 

150 : 3 = 50 (kg)

Xe thứ nhất chở số kg gạo là:

50 x 60 = 3000 (kg)

Xe thứ hai chở số kg gạo là:

3000 - 150 = 2850 (kg)

Đáp số: Xe thứ nhất: 3000kg; Xe thứ hai: 2850kg.

6 tháng 11 2021

Đáp án:

Giải thích các bước giải:

 Trung bình mỗi xe chở được:

( 4,3 + 4,5 + 3,8 ) : 3 =4,2 ( tấn gạo)

4,2 tấn = 42 tạ

Đáp số : 4,2 tấn gạo

              42 tạ gạo  

24 tháng 11 2021

b uồi vai^

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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20 tháng 10 2021

Đáp án:

 

Giải thích các bước giải:

 BÀI 14 :

  180 bao cân nặng số kg là

         180×50=9000 ( kg )

nếu mỗi bao gạo cân nặng 45 kg thì xe đó chở được số bao là

         9000÷45=200 ( bao )

bài 15 :

6 ngày gấp 3 ngày số lần là

   6÷3=2 ( lần )

3 ngày cần phải thêm số người là

   12×2-12=12 ( người )

2072m²=0,2072ha

20 tháng 10 2021

150 bao

Trung bình mỗi xe chở được số tạ gạo, tấn gạo là :

( 4,3 + 4,5 + 3,8 ) : 3 = 4,2 ( tấn )=> 0,42 tạ

HT

SAI THÌ THÔNG CẢM NHÉ !

DD
28 tháng 10 2021

Đổi: \(4\)tấn \(200kg=4,2\)tấn; \(4\)tấn \(300kg=4,3\)tấn; \(3\)tấn \(700kg=3,7\)tấn.

Cả ba xe chở số gạo là: 

\(4,2\times3=12,6\)(tấn) 

Xe thứ ba chở số tấn gạo là: 

\(12,6-3,7-4,3=4,6\)(tấn) 

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