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một bao gạo là :

20:1x4 bằng 80 kg

Đáp án là :

80x3:5 bằng 48 kg

8 tháng 8 2024

Bao gạo đó có cân nặng là:

`20:1/4=80(kg)`

3/5 bao gạo đó có cân nặng là:

`3/5 xx 80 = 48(kg)`

ĐS: ... 

19 tháng 3 2022

1 bao gạo nặng 

10:1/4= 40 (kg)

2/5 bao gạo nặng

40x 2/5= 16 (kg)

19 tháng 3 2022

Bao gạo đó cân nặng là :

     10 : \(\dfrac{1}{4}\) =40 ( kg )

\(\dfrac{2}{5}\) bao gạo đó nặng là :

     40 x \(\dfrac{2}{5}\)=16 ( kg )

 

                 ĐS : 16 kg

9 tháng 7 2021

Bao gạo đó nặng là

\(20\div\frac{1}{4}=80\)(kg)

\(\frac{3}{5}\)của bao gạo đó nặng là

\(80\times\frac{3}{5}=48\)(kg)

8 tháng 10 2023

Cân nặng ban đầu của bao gạo:

\(10:\dfrac{1}{4}=40\left(kg\right)\)

2/5 của bao gạo nặng số ki-lô-gam là:

\(\dfrac{2}{5}\times40=16\left(kg\right)\)

Đáp số: 16 kg 

8 tháng 10 2023

Bao gạo cân nặng số ki-lô-gam là : 

10 : 1/4 = 40 (kg)

2/5 bao gạo nặng số ki-lô-gam là :

40 x 2/5 = 16 ( kg ) 

      Đáp số : 16 kg

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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1 tháng 12 2017

3)Giải

Ta coi số gạo nếp là 4 phần

           số gạo tẻ là 5 phần

Tổng số phần bằng nhau là

4+5=9 (phần)

Người đó bán được số ki-lô-gam gạo nếp là:

31,5:9x4=14 (kg)

Người đó bán được số ki-lô-gam gạo tẻ  là:

31,5-14=17,5  (kg)

Đáp số : gạo nếp: 14 kg

              gạo tẻ  : 17,5 kg

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
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 

14 tháng 4 2016

Túi gạo đó nặng số kg là:

24 : 3/8=64(kg)

60% túi gạo đó nặng số kg là:

64 x 60%=38,4(kg)

14 tháng 4 2016

Túi gạo đó cân nặng là :

24 : 3/8 = 64 ( kg )

60% túi gạo đó cân nặng là :

64 x 60% = 38,4 ( kg )

Đáp số : 38,4 kg