1. Tim is going to see the doctor later about his bad back

2. I think I will call Sarah to see if she wants to go out

3. I do not confidently pass my driving test

4. Maria eats very little because she doesn't want to put on weight

5. He was brought a big steak by the waitress

6. He will arrive late again

2+2+2+2+2=10

55 x 30 x 2 + 110 x 50 + 55 x 40

= 3300 + 5500 + 2200

= 11000

=3300+5500+2200

=11000

a+(b-b)=a

\(\frac{1}{1}\cdot\frac{1}{2}+\frac{1}{2}\cdot\frac{1}{3}+\frac{1}{3}\cdot\frac{1}{4}+\frac{1}{4}\cdot\frac{1}{5}+\frac{1}{5}\cdot\frac{1}{6}=\)

\(\frac{1}{1\cdot2}+\frac{1}{2\cdot3}+\frac{1}{3\cdot4}+\frac{1}{4\cdot5}+\frac{1}{5\cdot6}=\)

\(\frac{1}{1}-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+\frac{1}{5}-\frac{1}{6}=\)

\(\frac{1}{1}-\frac{1}{6}=\frac{5}{6}\)

k nha gõ mỏi tay lắm

\(10+20=30\)

\(30+40=70\)

\(50+60=110\)

\(70+80=150\)

9+9=18

10 + 20 = 30

30 + 40 = 70

50 + 60 = 110

70 + 80 = 150

Dùng từ trong khung để điền vào chỗ trống:

Charles Dickens, one of the greatest English writers, was born into a poor (1) ... family in Portsmouth in 1812. Because the family was (2) ..., the father was constantly in (3) .... When he couldn't (4) ... his debts, he was put into a (5) .... Charles had to leave school and worked in a (6) ... labelling bottles. Mr Dicken (7) ... some money and he was (8) ....

Charles went to school again.