Fill in the blanks.
1. The minimum multiple of a number is 12. This number is, and its factor is.
2. The maximum factor of a number is 36. This number is, and its factor is.
3. The factor of18 is, and the factor of 24 is,
Their common factor is.
A number is both a factor of 30 and a factor of 45. The maximum quantity is.
5. Write two one-digit numbers whose common factor is only 1: sum, which is the smallest of the two numbers.
The common multiple is.
6. There are two integers A and B. If a=4b, then (a, b) =, [a, b] =.
7. Fill in ">" in the box below. "<" or "=" symbol.
0. 1250 1.403 6.5km 06km。
8. Cut the 2m-long rope into four sections on average, each section is () meters long and each section is () () long.
9. There are () true fractions with denominator of 7 and () false fractions with numerator of 7; The decimal unit is. The highest true score is (), the lowest false score is (), and the lowest band score is ().
10,57 means to divide () into () shares on average, and that's it. Its decimal unit is (), and there are () such decimal units. If you add a decimal unit like (), it is equal to 1.
Second, the judgment question. (** 10, 2 points for each question)
1. The greatest common factor of two continuous natural numbers is 1. ( )
2. The factor of a number must be less than its multiple. ( )
3. 1 is a factor of any integer. ( )
4. When the greatest common factor of two numbers is 1, the least common multiple of two numbers is their product. ()
5. True scores are all less than 1, and false scores are all greater than 1. ……………………………………………()
Third, choose. Fill in the correct options in (). Comparing calculation, which is the correct answer?
1, 6 years and 7 months = ()
67 10
2. Rice means to divide () into 7 parts on average, which means 4 parts.
A.4m B. 1m C. Unit "1" 3. The number of any two natural numbers is infinite.
Common multiple b common factor c multiple
4. In the following figures, the number of factors is the largest.
One piece 18B 27C 47
5. The greatest common factor of two numbers is 15 and the least common multiple is 90. These two numbers must not be.
A 15 and 90 B 45 and 90 C 45 and 30
Fourth, write the greatest common factor and the least common multiple of each group number.
32 and 1 12 and 18 72 and 48.
4 and 15 5 and 7 90 and 30
5. Correct transformation. If you do the math carefully, you can do it right!
1. Turn the following false scores into integers or fractions.
= = = =
2. Decimal following components.
0.7= 0.25= 0.04 1= 3.2=
Intransitive verbs solve practical problems. .
1 class and class 5 (1) have a total of 48 people. There are 39 students with more than 80 points in the mid-term exam. What percentage of students are under 80 in the class?
2. The area of a piece of colored paper is 45 square decimeters, and 20 square decimeters have been used. How much is this colored paper used? How much of this colored paper is useless?
3. Master Zhang made 7 parts in 6 minutes and Master Wang made 8 parts in 7 minutes. How many parts do they make every minute? Who does it faster?
4. The school bought 5 boxes of chalk and 90 boxes of chalk, which were distributed to class 18 on average.
(1) How many boxes are assigned to each class?
(2) How many boxes are assigned to each class?
Party A and Party B go to the library to borrow books. Party A goes every four days and Party B goes every five days. If they meet in the library on July 1, when will they go to the library at the same time?
6. A rectangular piece of paper, with a length of 18cm and a width of 12cm, can be cut into a square with the same size and a whole cm side, without redundancy. How many pieces can I cut at least?
7. The students made 24 red flowers and 56 yellow flowers and divided them into the same bunch. How many bundles can it be divided into at most? How many red flowers and yellow flowers are there in each bouquet?
8. Students in a school do exercises and divide them into three groups: 10, 14 and 18, all of which have just been finished. How many students are there in this school?