1, χ yuan for each dress, and () yuan for seven clothes of the same style.
2. Xiaohong's position in the classroom is (3, 4) right. She sits in column () and row (). Xiao Li is in the classroom.
The position of is column 6, line 2, which is represented by the number pair ().
The least common multiple of 3, 7 and 8 is (); The least common multiple of 6 and 10 is (). The greatest common factor of 4, 12 and 8 is (); The greatest common factor of 14 and 2 1 (). 5. "Planting cucumbers in vegetable fields" means taking () as the unit "1" and dividing it into (
) copies,
This is () cucumber. 6. Fill in ">" in ○. , "<" or "=".
zero
○ 0.75
○ 0.35
7.(A is a natural number greater than 0), when A is a true score, when A is a false score, when A,
Equal to 3. 8、 1= =
=2
6= =
9. Xiaoming bought 2 kilograms of apples with 3 yuan money, each kilogram of apples is () yuan, and each yuan can buy () kilograms of apples. 10, put the simplest score in brackets.
80cm = () m 650ml = () L。
250 m2 = (
) 48 cents = (
) when
1 1. The cinema has 30 seats in one row. Xiaoming and Xiaohong go to the movies. They want to sit together, and Xiaohong sits on Xiaoming's left.
) Different sitting postures.
Second, judge. (Tick √ in brackets for correctness, tick ×) for error. )
1, the equation must be an equation, and the equation must also be an equation. ............... () 2. The least common multiple of two numbers must be greater than two numbers. .......... () 3. The greatest common factor of two adjacent natural numbers is 1. ………(
)
4. The fraction whose numerator and denominator have no common factor is called simplest fraction. …………(
)
5. "The time of a class is hours" means that the time of a class is regarded as the unit "1". ..... () Third, choose. Write the serial number of the correct answer in brackets. ) 1, in the following formula, (
) is an equation.
a . 6+7 = 13 b . 5χ& gt； 12 C. χ+ 12=78 D. 4.5-χ
2. The scores are equal (
) one.
A. 1 B. 2 C. 50 D。
3. The sum of five consecutive odd numbers is 45, of which the largest number is ().
a、9 B、 13 C、 15
d、49
4. Put10g of salt into 90g of water, and salt accounts for () of brine.
A.
B.
C.
D.
The greatest common factor of 5, 18 and () is 9.
A.3 6 B. 12 C.5 27 D.36 Fourth, calculation. 1. Solve the equation.
χ-3.6= 1.4 4χ= 15 χ+0.42=4.2
χ÷ 1.4=0.5
(List equations and solve them)
2. Using fractions to express the quotient of the following questions is to turn false fractions into integers or use fractions. 12÷7 50÷3
11÷12 25 ÷ 5 v. Operation
(1) number pairs indicate that the position of high school on the map is (
), the location of the TV station is ()
(2) The development zone is in (15,7) and the railway station is in (9,8). Please mark it on the map. (3) From No.2 Primary School to Hope Square, you should go to () first, and then to (). Sixth, solve the problem. . com
1, supersonic planes fly 0.5 kilometers per second, which is 20 times the distance traveled by trains per second. How many kilometers does the train travel per second? (column equation solution)
Giraffes are about 6 meters tall, which is 4.35 meters higher than gorillas. How tall is this gorilla? (column equation solution)
3. Xinmin Oil Plant used 100 kg of peanuts to extract 35 kg of peanut oil. How many kilograms of peanut oil can be squeezed out per kilogram of peanut on average? How many kilograms of peanuts does it take to extrude 1 kg oil?
The 10th National Games of People's Republic of China (PRC) was held in Nanjing, Jiangsu. The host Jiangsu team won 56 gold medals, 38 silver medals and 42 bronze medals, ranking first in the country.
(1) How much more gold medals are there than silver medals in Jiangsu? (expressed by the simplest fraction)
(2) How many gold medals did Jiangsu win? (expressed by the simplest fraction)
5. Xiaoming bought 2 kilograms of pears, * * * 22; Xiaoli bought 3 kilograms of pears, ***24. What is the average weight of each pear bought by two people? (The result is expressed as a fraction, which is reduced to the simplest fraction. Who bought a bigger pear? Other questions:
1, a string of colorful flags ***53 faces, arranged in the order of 1 red 2 yellow 1 green. The yellow flag is a fraction of the red flag.
There are 2 students in one class, with more than 3 students in 7 rows and less than 4 students in 8 rows. How many people are there in this class at least?