D Trong nước 

\(\left(\dfrac{1}{7}\right)^2.\dfrac{1}{7}.\dfrac{1}{49^2}\) 

\(=\dfrac{1}{7^2}.\dfrac{1}{7}.\dfrac{1}{\left(7^2\right)^2}\) 

\(=\dfrac{1}{7^3}.\dfrac{1}{7^4}\) 

\(=\dfrac{1}{7^7}\)  \(\left(=\dfrac{1}{823543}\right)\) 

tìm x hả bạn ? 

Choose the word which best fits each gap

  Breakfast is the 1) ........ importanr meal of the day . It provides the nutrients your body needs for good health , the calories it needs for 2) ....... and helps to maintain your blood sugar level . Studies have shown that people who don't have breakfast have a low blood sugar level and are often slow , tired , hungry and 3) ............ to concentrate . Suprisingly , breakfast actually plays a part in weight control . It's easier to 4) ........ weight if you eat in the morning rather than later on the day . Dividing the day's calories 5) ......... three meals helps take off weight more efficiently than 6) ........... breakfast and having two larger meals a day does . 

 Điền từ giúp mình nha 

VIII . Fill in each blank with a suitable preposition 

1. Would you like to go out ? - No , thanks . I'd rather stay ...... home . 

2. If you're going to watch a football , you can  count me ....... .   I don't like football .

3. I've put .... 2kg in the last month 

4. The Japanese eat healthily , so they live ....... a long time 

5. Sitting so close....... the TV hurts your eyes 

6. Be careful ......... what you eat and drink . 

7. She run six miles every day to keep her shelf ........ shape 

8. Watching TV so much isn't good ............. your eyes .