Số gạo còn lại sau buổi sáng là:

\(250 - 100 = 150\) (kg gạo)

Buổi chiều bán số kg gạo là:

\(150\) \(\times\) \(\frac{1}{3}\) \(= 50\) (kg gạo)

Cả hai buổi cửa hàng bán được số kg gạo là:

\(100 + 50 = 150\) (kg gạo)

Đáp số: \(150\) kg gạo.

a) chó là con vật được nhiều bạn lựa chọn nuôi nhất

b) Trong nhóm học sinh, có 6 bạn chọn nuôi mèo.

c) Số lượng bạn nuôi chó nhiều hơn số bạn nuôi thỏ là 4 bạn

a) 20 × 3 246 × 5

= 20 × 5 × 3 246

= 100 × 3 246

= 324 600

b) 346 × 53 + 346 × 47

= 346 × (53 + 47)

= 346 × 100

= 34 600

a) \(\frac{1}{2}\) của \(20\) km là 10 km.

b) \(\frac{1}{7}\) của \(28\) g là 4 g.

c) \(\frac{3}{10}\) của \(100\) ml là 30 ml.

d) \(\frac{2}{3}\) của \(1\) giờ là 40 phút.

247​ \(+\) \(\frac{13}{6}\) \(=\) \(\frac{7}{24}\) \(+\) \(\frac{52}{24}\) \(=\) \(\frac{59}{24}\)

\(\frac{12}{49}\) \(-\) \(\frac{1}{7}\) \(=\) \(\frac{12}{49}\) \(-\) \(\frac{7}{49}\) \(=\) \(\frac{5}{49}\)

\(\frac{5}{8}\) \(\times\) \(\frac{24}{25}\) \(=\) \(\frac{3}{5}\)

\(\frac{38}{21}\) \(:\) \(\frac{19}{3}\) \(=\) \(\frac{38}{21}\) \(\times\) \(\frac{3}{19}\)\(\)\(\) \(=\) \(\frac{2}{7}\)

34287 × 65 = 2228655

557 130 : 42 = 13 265

Natural disasters are one of the biggest problems that Vietnamese must face to face nowadays. One of the most common natural disaster in Vietnam is flood. The flood can cause damage to houses and peoples. A lot of people lose homes and property. Not only that, they also suffer the pain of losing their relatives and their friends. After understanding the bad effects of hurricanes, there are some solutions to prevent the flood. Firstly, you should always update the news about the hurricanes and floods. Secondly, you should prepare things such as water, food, clothes, medicines, emergency kit, ...Thirdly, we should reinforce our house and always be ready to evacuate. In conclusion, I can say that natural disasters are extremely dangerous, but we can prevent them by doing what I say.

1, He asked the villagers how often the earthquakes occur in that region.

2,They told me that I could find a wide range of beauty products in their store 

1. I think robots can't replace the role of teachers in education

2. People will still send letters to each other in 2050