1. Xiao Qiang bought 5 boxes of sugar, Xiaohong bought 5 boxes of cakes, and * * * used 44 yuan. If Xiao Qiang and Xiaohong exchange a box, the prices of all items are equal for each person. Q: How much is a box of candy and a box of cakes?

Answer:

4* sugar+1* cake = 1* sugar +4* cake

3* sugar = 3* cake

So the price of sugar is equal to the price of cake.

44/(5+5) = 4.4 (Yuan)

A box of sweets and a box of cakes are all 4.4 yuan.

Second, the price of badminton rackets is 6.5 times that of badminton drums. The teacher bought a badminton racket, five badminton drums, 24 1.5 yuan. How much is a badminton racket and a badminton drum?

Answer:

Solution: set a badminton x yuan and a racket 6.5x

6.5x+5x=24 1.5

1 1.5x=24 1.5

x=2 1

5x= 105

A: A racket 105 yuan and a badminton 2 1 yuan.

3. I bought three ballpoint pens and seven exercise books with 10 yuan, and the remaining money was 0. 14 yuan for a ballpoint pen and 0.8 yuan for an exercise book. How much is a ballpoint pen?

Answer:

Set a ballpoint pen x yuan.

( 10-3X-0.8)/8 =( 10-4X+0. 14)/7

X= 1.52

4. The rectangle has an area of 2.88 square meters and a length of 1.8 meters. What is the circumference of this rectangle?

Answer:

2.88/ 1.8= 1.6 (m)

(1.6+ 1.8)*2=6.8 (m)

So the circumference of this rectangle is 6.8 meters.