1. Fill it in.

(1) Two fifths of a number is 46, and 60% of it is (69).

(2) In the seed germination test, 48 seeds germinated and 2 seeds did not germinate, and the germination rate of these seeds was 96%.

(3) 47.3 kilograms of oil can be extracted from 86 kilograms of peanut kernels, and the oil yield is 55%.

(4) Of the three numbers of three sevenths, 42.8 percent and 0.43, the largest is (0.43) and the smallest is (3 sevenths).

(5) A number is one sixth of B number, and B number is 500% more than A number.

(6) The wheat yield in Dongfeng Township this year is 0. 15 higher than last year, and this year's wheat yield is 0. 1 15 higher than last year.

(7) The amount comparison between Party A and Party B is 4:3. If Party A gives Party B 8 yuan money, the ratio between them is 4:5. Party A's original (36) yuan and Party B's original (27) yuan.

(8) Put several chickens in several cages. If there are four chickens in each cage, 1 chicken has no cage. If you put five chickens in each cage, there will be at least () chickens.

(9) Xiaohua bought 80 stamps with 2 yuan *** 16 and spent 80 cents with 18 yuan, so he bought 80 stamps with (1 1) and 2 yuan stamps with (5).

(10) The school-run clothing factory will produce a batch of student clothes of a certain model. It is known that a piece of 3-meter-long cloth can make two coats or three trousers, and one coat and one trousers are a set. It is planned to use this 600-meter-long cloth to produce student clothes. Only when (360) cloth is used to produce coats and (240) cloth is used to produce trousers can they be just matched, and * * * can produce (240) sets.

(1 1) 1/2 times 4 means (2) 4 times 1/2 means (2)

(12) Three quarters of an hour =( 45) Two fifths of a kilometer =( 400) meters.

(13) The difference between one-third and two-thirds and his reciprocal is (32/30).

(14) Two thirds of nine meters equals one quarter (24) meters.

(15) Cut the seven-meter-long iron wire into five sections, each section is seven meters (1 5) and each section is (1.4) meters long.

(16) In the same circle, the ratio of the length of the diameter to the length of the radius is (2: 1).

(17) A circle has (countless) symmetry axes, and a semicircle has (1) symmetry axes.

(18) Class 6 (1) Today, two people called in sick, one had an accident, and the attendance rate was 94%. There are (50) people in Class Six.

(19) If the ratio of A to B is 4:5, A is 20% less than B, and B is 25% more than A..

2. Judge whether it's true or false (tick "√" for the correct one and "×" for the wrong one)

(1) 30 tons weighs 0.3. ( × )

(2) One eighth of 100 meter is equal to 12.5 percent of100 meter. ( √ )

(3) The attendance rate of Class One, Grade Five today is 98%, so the absenteeism rate is 2%. ( √ )

(4) If the percent sign of 15% is removed, the number will be reduced to 1%. ( × )

(5) If the number A is 20% more than the number B, and the number B is 20% less than the number A. (×)

(6) When withdrawing money, the bank pays an extra sum of money at the interest rate. ( × )

(7) After inspection, all 98 products are qualified, and the qualified rate is 98%. ( × )

A wire is 90 meters long. ( × )

(9) Put 2g of salt into100g of water, accounting for 2% of salt and brine. ( × )

(10) To convert decimals into percentages, just move the decimal point to the right by two places and add hundreds of semicolons. (√)

(1 1) if a = one of b, then a and b are reciprocal, (both a and b are greater than 0)( √).

(12) The qualified rate of products shall not exceed 100%. ( √ )

(13) Any straight line passing through the center of a circle is its symmetry axis. ( √ )

3. Multiple choice questions:

(1) A hotel has 20 triple rooms and two rooms * * *, and the total * * * can accommodate 48 passengers, so the hotel has (c).

A. Three people have four rooms and two people have sixteen rooms. B: There are twelve triple rooms and eight double rooms.

C. Three people have eight rooms and two people have twelve rooms. D. ten rooms for three people and ten rooms for two people.

(2) Zhenhua Primary School has donated a number of books to the second-grade students of Gaochun Primary School in poor areas. If each student lacks six books and each student has five more books, then there will be students in Grade 2 (C) of Gaochun Primary School.

a . 8 b . 10 c . 1 1d . 22