=4400-2500

= 1900 (Taiwan Province)

Class 2.6 (1) has 25 boys and 20 girls. What percentage of boys are more than girls in the class?

Q: (25-25)/(25+20)* 100% [Note: the molecule in your formula is wrong, it should be (25-20)]

3. The number A is 30, which is 25% less than the number B. What is the number B?

Q: Method 1 min? What does the score mean?

Method 2 Arithmetic method 30÷( 1-25%)=40.

4. The round dining table is 2m in diameter with a tablecloth on it. The edge of the tablecloth is 20 cm wider than the desktop.

Q: (1) What is the circumference of the tablecloth?

20 cm =0.2 m3.14× (2+0.2÷ 2) = 6.594 m.

(2) What is the tablecloth area of the extra desktop?

3.14× (0.2÷ 2) = 0.314 m2.

(3) If one person needs a table with a width of 0.5 meters, how many people can sit at this table?

3. 14×2÷0.5≈ 13 people

5. The deposit interest rate for half a year is 3.30%, so if you deposit 1000 yuan for half a year without interest tax, how much interest should you get? The formula is 1000×3.30%=33.

Please use the quantitative relationship to show that the output in May increased by 20% compared with that in April.

Q: ① The output in May is higher than that in April/the output in April =20%.

② May output/April output = 120%

According to "the number of boys in a class accounts for five-sevenths of the class"

Q: ① Number of boys/class size =5/7.

② Class size/boys = 1÷5/7