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The fifth grade first semester mathematics final examination paper.
Class name score
I. Fill in the blanks (1 each blank, ***20 each blank)
1、5.43? The product of 0.45 is a decimal place, and two decimal places are reserved.
2. 3.2 hours = 2.15m = decimeter.
13400 m2 = 2.5 tons = kg.
3. fill in o? & gt& lt？ Or? =? Number.
4.25? 0.98 O 4.25 6.75？ 0.65 to 6.75
2.6? 1.0 1 O 2.6 7.2？ 1.3 O 7.2？ 1.3
4. One reserved two decimal places is 2.3, and the highest and lowest of these two decimal places are.
5, a football 85 yuan, a volleyball one yuan, football is more expensive than volleyball, a football two volleyball * * * yuan.
6. The solution of equation 3x+6=24 is.
7. The upper base of the trapezoid is 5 cm long, the lower base is 8 cm long and the height is 2.4 cm. The area of this trapezoid is square centimeters.
8. There are six balls in the box, which are marked with the numbers 1, 2, 3, 4, 5 and 6 respectively. Touch any one. It may be singular.
The number of 9.0.3 is more than 4 times that of 2.5.
10、5.08? The reserved integer part of the product of 1.0 1 is about.
Second, the question of right and wrong (right? , wrong number? ) (5 points)
1, a2 and 2a have the same meaning ()
2. After a rectangle nailed with four pieces of wood is drawn into a parallelogram, the perimeter remains unchanged. ( )
3.8.888888 is a cyclic decimal. ( )
4. All equations are equations, but all equations are not necessarily equations ().
5. The dividend is constant, the divisor is enlarged by 100 times, and the quotient is also enlarged by 100 times. ( )
Three, multiple-choice questions (choose the serial number of the correct answer in brackets) (6 points)
1, the number where B is five times more than A is ()
a、5a-5b B、5(a+ b) C. 5(a-b)
2. The following equation is ()
a . 5a+b . b . 8+3.3 = 1 1.3 c . x+9 = 6
Each empty bottle can hold 2.5 kilograms of salad oil. Teacher Wang needs at least () bottles to put 25.5kg salad oil in such bottles.
a、 10 B、 10.2 C、 1 1
4. Known 0.35? 170=59.5, then 3.5? The product of 1.7 is ()
0.595 B、5.95 C、59.5 D、595
5. Right 6.4? 10 1-6.4 For simple calculation, () will be used.
A, multiplicative commutative law b, multiplicative distributive law c, multiplicative associative law
6. If the base and height of a parallelogram are enlarged twice, its area will be enlarged.
() times.
a、2 B、4 C、8
Four, calculation (42 points)
1, oral calculation (4 points)
0.25? 4= 0.72? 12= 6.8? 4= 0.8? 12.5=
13.8? 0= 100? 99.5= 0.8 1? 0.9= 2.4? 5=
2. Vertical calculation. (10)
2.06? 4= 54.72? 1.8= (checking)
8.62? 4.3? (Keep two decimal places) 42.5? 6. 1= (checking)
3. Calculate the following questions (simple calculation) (12 points)
7.2? 0. 18+20.8? 3.6 16? 12.5? 4.3
78? 0.25? 0.4 3. 14? 2.6+ 1.86? 2.6
4, solve the equation (9 points)
5x-24 = 20 2x+3.6 = 5.6 9.3 x-6.2x = 24.8
5. Find 7 points of the area (unit: cm) in the figure below.
Verb (abbreviation of verb) application questions (27 points, 1-4, 5 points for each question, 7 points for 5 questions)
1. The experimental primary school bought two footballs and five basketballs at a price of 283 yuan, each with a 49 yuan.
How much is each basketball?
2. The Forbidden City covers an area of 720,000 square meters, which is 65,438+600,000 square meters less than Tiananmen Square. What is the area of Tiananmen Square?
3. There is a harvester, the working width is 1.8m, and the line speed is 5km per hour. You can finish harvesting the fields below in a few hours. (Numbers are reserved as integers)
4. A toy factory originally needed materials from 3.8 yuan to make a plush rabbit, but later improved the production method, and each rabbit only needed materials from 3.6 yuan. I was going to make 180 plush-free materials. How many can I make now?
5. After Xiaohua moved into the new house, her mother bought 6 pairs of male slippers, 8 pairs of female slippers, and one pair used 92 yuan. How much is a pair of male slippers and female slippers in 8 yuan? (Equation solving)