1. Divide the bamboo pole of m into three sections on average, each section accounts for () of the total length, and each section is () m long.
2. Draw a circle in a rectangle with a length of 10cm and a width of 8cm. The circumference of this circle is () cm and the area is () cm 2.
Li Ming spent ten yuan on twenty books and English books. He bought a 40-jiao writing book and an 80-jiao English book.
Second, sentence.
1. Put 5g of salt into 20g of water, and the ratio of salt to brine is 1:4. ( )
2. The numerator plus 2 keeps the proportion unchanged, and the denominator plus 2. ( )
3. The first and last items of the ratio are multiplied or divided by the same number at the same time, and the ratio remains unchanged. ( )
A sweater is 25% more expensive than a pair of trousers, so a pair of trousers is 25% cheaper than a sweater. ( )
On Saturday, Xiaohua's family of eight went to the zoo to play. 30 yuan for adults and 5 yuan for children/kloc-0. It took 2 10 yuan to buy tickets, including 6 adults. ( )
Third, choose one.
1, a line is only 120m. After intercepting 1/3, there is () m left.
A.60 B. 40 C.80
2, the price of a coat 100 yuan, first raise the price, then lower the price. Current price ()
A. lower than the original price B. higher than the original price C. equal to the original price
3. The degree ratio of three internal angles of a triangle is 5:6:7, and this triangle is ().
A. acute triangle B. right triangle C. obtuse triangle
4. Each pen 12 yuan, each ballpoint pen 7 yuan. * * * I bought 6 pieces, used 52 yuan and bought () pieces.
A.2 B. 4 C. 3
Fourth, practical application.
1. A construction worker used 2 parts of cement, 3 parts of sand and 5 parts of stone to prepare a kind of concrete. If you prepare 8000kg at a time, how many kilograms of cement, sand and stones do you need?
2. Xiaogang kept 350 yuan money in the bank for two years, with an annual interest rate of 3.33%. After two years, what brand of MP3 can he buy? (excluding interest tax) (A MP3 380 yuan, B MP3 370 yuan)