The least common multiple of 2, 6 and 8 is (). The least common multiple of 4 and 9 is ().
3, = = = 12÷( )= () (decimal)
4. Divide the 5-meter-long rope into 9 sections on average, each section is full-length and each section is meters long.
5. If a÷b=5 (and both A and B are not natural numbers of 0), their greatest common factor is () and their smallest common multiple is ().
6. If the solution of equation 3x = 7.2 is (), then 2x+3.5 = ().
7. Fill in the simplest score in brackets.
400kg = () ton15min = ()
60 cm = () m 250 ml = () L。
The decimal unit of 8 is (), and the result is the smallest prime number after adding the decimal unit like ().
9., and the order of these three scores from small to large is ().
123456789
10, and the sum of two numbers in the right table box is 3. Moving this box can make the sum of the two numbers in each box different. A * * * can get () different sums.
Second, judge carefully. (5 points)
1 and the false score are both less than 1. ……………………………………………( )
2. In plan view, the number pairs (8, 3) represent the eighth row and the third column. ……………( )
3. The greatest common factor of two natural numbers must be smaller than both. …… ( )
4,4a = 24 is not an equation. ………………………………………………( )
5. The simplest true fraction is the fraction whose numerator and denominator have no common factor. ……………( )
Third, choose carefully. (5 points)
The position of 1, (5,7) after moving three squares to the right is represented by a number pair ().
a 、( 5， 10) B 、( 2，7) C 、( 8，7) D 、( 5，4)
2. After a rope is folded in half for three times, each rope is full length ().
A, B, C, D,
3, and the score is ().
A means the same; B, the scores are equal; C, the score unit is the same; D, it's all the same
4. Add 12 to the numerator, and the denominator should be () to keep the size of the score unchanged.
A, add 12 B, multiply by 4 C, divide by 4 D, and add 16.
A car travels 9 kilometers in 6 minutes. Driving 1 km requires () points.
A, B, C, D,
Fourth, the calculation problem. (43 points)
1. Decimalize the following into components. (8 points)
0.7= 0.25= 0.04 1= 3.2=
2. Convert the following fractions into decimals and keep three decimal places. (8 points)
3. Solve the equation. (18)
X÷5=4 368+X=740 2X=0.56
X÷3 = 160 5X = 13 X-0.54 = 7.25
4. Find the greatest common factor and the least common multiple of the following groups. (9 points)
10 and 9 6 and 8 12 and 15.
Fifth, the operation problem. (8 points)
There are 50 odd numbers in a * * * in the table below, and the sum of the five numbers in the black box is115; Observe carefully and answer the questions.
1, can you find out what the sum of the five numbers in each box has to do with the middle number?
2. If the sum of five numbers in the box is 235, how should I pack it? (Frame the picture with a colored pen)
3. Can you box five numbers that add up to 205? Why?
4. How many sums of different sizes can a * * * box take out?
Sixth, solve practical problems. (36 points)
1, the distance from Yangzhou to Nanjing is 90 kilometers. A car traveled 35 kilometers from Yangzhou to Nanjing. How much has the whole journey been completed?
The supersonic plane flies 500 meters per second, which is 20 times the distance traveled by the train per second. How many meters does the train travel per second? (Equation solving)
3. A garden has 2 hectares and is divided into 5 parts on average. How many hectares are there in each part? Among them, there are 3 kinds of Chinese rose flowers, and the area of Chinese rose flowers accounts for a fraction of the whole garden.
4. A piece of cloth is 8 meters long and can be made into 12 aprons of the same size.
(1) How much is this fabric used for each apron?
(2) How many meters is the fabric of each apron?
4. Master Wang made 8 parts in 5 days and Master Zhang made 1 1 parts in 8 days. Who does it faster?
Party A and Party B borrow books from the library. Party A comes every six days, and Party B comes every eight days. If they meet in the library on April 25th, when will they go to the library next time?
6. On a piece of paper 36 cm long, draw a red dot every 3 cm from the left end, and then draw a red dot every 4 cm from the left end. There are no pictures at both ends of the note. Finally, how many red dots are there on the note?