First, write the number directly. (8 points)
1/2+ 1/2= 1/2+ 1/3= 7/9—7/9= 5/6—2/3=
1—5/ 1 1= 3/4+3/4= 2/7—2/7= 1— 6/ 13=
Second, I can fill it out. (25 points)
The factors of 1 and 16 are (), the factor of 24 is (), and the greatest common factor of 16 and 24 is ().
2.45, 9 and 5, () is a factor of (), and () is a multiple of ().
3. The greatest common factor of15 and 9 is (), and the smallest common multiple is ().
There is a two-digit number 5□. If it is a multiple of 5, □ can be filled with (). If it is a multiple of 3, □ can be filled with (); If it is a multiple of 2 and 5 at the same time, □ can be filled with ().
5. In the natural number 1~ 10, the prime number has () and the composite number has ().
6. The simplest true fraction with denominator of 8 is (), and their sum is ().
7, 1 5/8 contains () 1/8. Subtract () 1/8, and the value is 1/2.
8. Divide the 3-meter-long rope into 5 parts on average, each part accounts for () of the total length, and each part is () meters long.
9. The parallelogram has a base of 5cm, a height of 4cm, an area of (), and an area of a triangle with equal base and equal height of ().
10. There are 8 red balls and 4 yellow balls of the same size in the pocket. You can randomly draw 1 ball. The possibility of drawing the red ball is (), the possibility of drawing the yellow ball is (), and the possibility of drawing the ball is the greatest.
Third, judge right or wrong. (5 points)
1, a three-digit number consisting of 2, 3 and 4, can be divisible by 3. ( )
2. All false scores are greater than 1. ( )
3. A factor with the largest number is itself. ( )
The multiple of a number is limited, but its factor is infinite. ( )
A 5.0 kg 65438+3/5 is as heavy as a 3 kg15. ( )
Fourth, make a choice. (5 points)
1. If 4□6 is a multiple of 3, you can put () in □.
a、 1、2、3 B、2、4、6 C、2、5、8
2. The bottom of the triangle remains unchanged. If the height is expanded by 4 times, then its area ().
A, expand by 4 times B, expand by 2 times C, which is uncertain.
3. Cut a parallelogram along the height, and you may get ().
A, triangle and trapezoid b, parallelogram and trapezoid
C, two triangles D, two trapeziums
4. Among the following scores, the score closest to 1 is ().
a、 1/7 B、8/9 C、 13/ 12
5. Naughty and Xiaoxiao donated their own 1/5 books to Hope Stack respectively.
A, Shao Xiao donated many books; B, naughty donated many books.
C. Laughing and naughty donated as many books as D. It is impossible to determine who donated more books.
Five, I can calculate (27 points)
1, careful calculation (18 points)
7/9— 2/3+ 2/9 1/2+ 1/3+ 1/4 1/5+3/8+4/5
4/7+ 2/9—4/7 1— 1/6—5/6 1/5+ 3/8+ 4/5
2, solve the equation (9 points)
x—5/6 = 1/9 1/2+x = 5/6 12x—9x = 8.7
Sixth, solve the problem. (30 points)
1. Paint the front and back of the trapezoid billboard. The upper bottom is 4m, the lower bottom is 5m, and the height is half of the upper bottom. If the paint is 0.6 kilograms per square meter, how many kilograms of paint do you need?
2. Divide 20 chocolates among 3 people equally. How much will everyone get? What about eight people on average?
3. Two engineering teams, Team A and Team B, built a road with a length of 1 1,400 meters. They started construction at both ends at the same time. Team A builds 80 meters every day, while Team B builds 60 meters every day. How many days will it take to complete this road?
4. Leisure travel agencies offer the following two AB preferential schemes: Scheme A: Two-day seaside tour, adult 260 yuan, child 140 yuan per person. Scheme B: Two-day seaside tour, with more than 7 people (including 7 people) in 200 yuan. If there are five adults and seven children, which scheme should I choose to save money?
In the forest sports meeting, the deer and the child ran the same distance, with 5/6 points for the deer and 6/7 points for the child. Who runs faster?
6. A story book. Xiaohong read 4/ 15 of the book on the first day and 1/4 of the book on the second day. How many books did she read in two days?