1.My mother likes going jogging in the morning

2.It's dificult for my sister to lift weights

3.We collected plastic bottles and sent to the factory

1. Reuse mean using something again instead throw it away

2. Do your school organise donation drive last winter? 

1. My hobby is swimming. It is a water sport. I have been doing it for 2 years. It requires strength and a litter bit of skill. I like it very much because it is a sport and it is very interesting.

2.You should wear suncream . you should eat much fast food. you should cycle in the morning. it will help you lose weight 

 K hông biết

1.

a, Các điểm thuộc đoạn thẳng BD là: điểm C, các điểm không thuộc đoạn thẳng BD là:A, E .

b, Các cặp đường thẳng song song là : AB - DE;

c, Các cặp đường thẳng cắt nhau và giao điểm của chúng là: AE cắt BD giao điểm là C; AC cắt BC giao điểm là C; DC cắt EC giao điểm là C

2.

.O__________.A__.M__.B_______x

Vì A, B đều nằm trên tia Ox và OA < OB(4<6)

=> AB = OB - OA

     AB = 6 - 4

     AB = 2

Vì M là trung điểm của AB và OA > AB (4>2)

=> OM = \(\dfrac{AB}{2}\) + OA

     OM = \(\dfrac{2}{2}\) +4

     OM = 1 + 4

     OM = 5

a,

\(\dfrac{2.3}{9.3}\), \(\dfrac{1.9}{3.9}\), \(\dfrac{5.1}{27.1}\)

= \(\dfrac{6}{27}\), \(\dfrac{9}{27}\), \(\dfrac{5}{27}\)

Vì \(\dfrac{5}{27}\) < \(\dfrac{6}{27}\) < \(\dfrac{9}{27}\)

=> \(\dfrac{5}{27}\) < \(\dfrac{2}{9}\) <\(\dfrac{1}{3}\)

Vậy trong 1 giờ đội làm được khối lượng công việc nhiều nhất là đội thứ hai, còn đội àm được ít nhất là đội thứ ba

b,

a,

x            = \(\dfrac{-5}{12}\)+\(\dfrac{2}{3}\)

x            = \(\dfrac{1}{4}\)

b,

      x = \(\dfrac{8}{5}\):\(\dfrac{-2}{3}\)

      x = \(\dfrac{-12}{5}\)

c,

\(\dfrac{4}{7}\) . x = \(\dfrac{-2}{7}\)

      x = \(\dfrac{-2}{7}\): \(\dfrac{4}{7}\)

      x = \(\dfrac{-1}{2}\)

a,\(\dfrac{-2}{7}\)+\(\dfrac{2}{7}\).\(\dfrac{5}{3}\)

=\(\dfrac{-2}{7}\)+\(\dfrac{10}{21}\)

= \(\dfrac{4}{21}\)

b,(\(\dfrac{-8}{19}\)+\(\dfrac{27}{19}\))-(\(\dfrac{-4}{21}\)-\(\dfrac{17}{21}\))
= \(\dfrac{19}{19}\)-\(\dfrac{-21}{21}\)

= 1-(-1)

=2

c,\(\dfrac{6}{5}\).(\(\dfrac{3}{13}\)-\(\dfrac{16}{13}\))

= \(\dfrac{6}{5}\).\(\dfrac{-3}{13}\)

=\(\dfrac{-18}{65}\)

a,\(\dfrac{-2}{7}\)+\(\dfrac{2}{7}\).\(\dfrac{5}{3}\)

=\(\dfrac{-2}{7}\)+\(\dfrac{10}{21}\)

= \(\dfrac{4}{21}\)

b,(\(\dfrac{-8}{19}\)+\(\dfrac{27}{19}\))-(\(\dfrac{-4}{21}\)-\(\dfrac{17}{21}\))
= \(\dfrac{19}{19}\)-\(\dfrac{-21}{21}\)

= 1-(-1)

=2

c,\(\dfrac{6}{5}\).(\(\dfrac{3}{13}\)-\(\dfrac{16}{13}\))

= \(\dfrac{6}{5}\).\(\dfrac{-3}{13}\)

=\(\dfrac{-18}{65}\)

a,\(\dfrac{-2}{7}\)+\(\dfrac{2}{7}\).\(\dfrac{5}{3}\)

=\(\dfrac{-2}{7}\)+\(\dfrac{10}{21}\)

= \(\dfrac{4}{21}\)

b,(\(\dfrac{-8}{19}\)+\(\dfrac{27}{19}\))-(\(\dfrac{-4}{21}\)-\(\dfrac{17}{21}\))
= \(\dfrac{19}{19}\)-\(\dfrac{-21}{21}\)

= 1-(-1)

=2

c,\(\dfrac{6}{5}\).(\(\dfrac{3}{13}\)-\(\dfrac{16}{13}\))

= \(\dfrac{6}{5}\).\(\dfrac{-3}{13}\)

=\(\dfrac{-18}{65}\)