The area of the rectangle is two-fifths of the square meter, and the area of the shaded part is two-fifths of the rectangle. Find the area of the shaded part.

Solution: two fifths × two fifths

= four fifths (m? ) a: the area is four fifths m? .

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Xiaojie read a book of 150 pages. If he reads 10 again, then the number of pages he has read is three-fifths of the whole book.

Solution: suppose you read page X. 150% 10 = 1/ 15

(X+ 10)÷ 150 = two fifths A: It accounts for one fifteenth of this book.

X = 80 A: eight fifths.

150-80=70 (pages) 70÷7= 10 (pages) A: Read 10 pages every day.

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In the third quarter, the monthly electricity consumption of Xiaoli's house was 14/ 15 of last month. It is understood that the electricity consumption in September was 225 kWh. How many kWh was used in September compared with July? If the electricity bill for 1 kwh is 0.6 1 yuan, how much less electricity will Xiaoli's family pay in July than in September?

Solution: 225×14/15 = 210 (degree)

210×14/15 =196 (degrees)

225- 196 = 29 (degrees)

29×0.6 1 = 17.69 (yuan)

A: September used 29 kWh more electricity than July.

Answer: underpaid 17.96 yuan.

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For two thirds of the fraction, the numerator and denominator are added with the same positive integer at the same time to get a new fraction. Is this score equal to two thirds? What conclusion can you draw?

Not equal. Add two thirds of the numerator and denominator and add 1 to get three quarters.

Add two fifths to the numerator and denominator.

Plus three and five sixths.

etc

The later figure is two thirds of the original.

Getting closer and closer to 1.

Landlord, you should be kind

Finally, give me the flag. I'm tired of looking for it. = =|||

Good luck,