Tìm x:

a) \(2x-12-x=0\)

\(2x-x=12\)

\(x=12\)

b) \(2x+69\cdot2=69\cdot4\)

\(2x=69\cdot4-69\cdot2\)

\(2x=69\cdot2\)

\(x=69\cdot2:2\)

\(x=69\)

Tính nhanh:

\(769\cdot85-769-75=769\cdot84-75\)

(sao tính nhanh được)

I.Fill in the flowing words and form meaningful phrases

choir/pride/flock/bunch/troop/flight/band/swarm/little

1.the cat has a.........................of five kittens

2.the........of singers sang melodiously

3.the jungle safari gave us an opportunity to spot a .......of lions

4.the poachers were attacked by a ..... of wild elephants

5.a.......of bees forced us to take shelter in the cave

6.a...............of stairs leads to the terrace

7.the .....of musicans delivered a magical performance

8.the children were amused by the .........of monkeys in the park

9.a.......of grapes was hanging from the vine

Chị hồng cho An số kẹo là 42x2/7=12 cái kẹo

Chị Hồng còn lại số kẹo là 42-12=30 cái kẹo

Chị Hồng cho Bình số kẹo là 30x3/5=18 cái kẹo

Đáp số An: 12 cái; Bình: 18 cái

câu 2   2   2 = 6 dễ kìa . 2 + 2 + 2 = 6

Rachel insisted they.......plenty of time.

A. have B. to have C. having D. had