1, write the number directly (10 points)
( 1)36×5 1 1 +6 1 1 ×36= (2)57 +9 17 +27 = (3)( 13 - 18 )×24=
(4) 12 + 14 + 18 + 1 16 + 132 + 164 + 1 128 = (5)45 +945 +9945 +99945 +999945 =
2. Off-mold calculation. (15)
( 1)98÷( 1 15 ÷ 27 ) (2)78 - 3 10 ÷ 65 (3)(23 + 14 )÷ 1 13 × 83
(4)54 - 27 ÷ 9 14 - 59 (5) 12×3 + 13×4 + 14×5 + 15×6 + 16×7 +……+ 129×30
3, solve the equation (6 points)
( 1)6X+ 1.5X = 30(2)( 1-80%)X = 15÷ 12(3) 13 X+ 14 X = 73
4. Column calculation. (6 points)
(1) 3 10 of a number is 124. What's this number? (2)7 15 times a number is equal to 320, which
What is the number?
Second, judge with your heart. (Draw "√" correctly and "×" incorrectly) (5 points)
( 1) 12 ÷ 1 12 ÷ 12 ÷ 1 12 = 1。 ( )
(2) The attendance rate is 99%, and the representative 1 person is absent. ( )
(3) If the side length of a cube is enlarged by 4 times, the volume will be enlarged by 16 times. ( )
(4) There are as many 18 of 7 as 78 of 1. ( )
(5) A commodity is first raised by 10% and then lowered by 10%, and the price remains unchanged. ( )
Third, choose one carefully. (Fill in the serial number of the correct answer in brackets) (12 points)
(1) Add a percent sign after 8, which is the original number ().
A, 1 time b, 100 time c, 10 time d, 1 100.
(2) If a× 150%=b×54 =c÷56 (a, B and C are not 0), then ().
A, a max b, b max c, c max d, uncertain.
(3) The chart is a fan-shaped statistical chart of the examination results of Class 6 (2).
Among them, excellent students 14, excellent students ().
a、2 B、 1 1 C、23 D、46
(4) The iron block with the volume of 1.5 cubic decimeter sinks into the iron block with the length of 5 decimeter,
In a rectangular container with a width of 2 cm (water does not overflow), the water surface will rise ().
A, 15 decimeter b, 1 0.5 decimeter c,1decimeter d, which cannot be determined.
(5) Use 12 cubes with the same size to form the following four cuboids with different shapes, and the largest surface area is ().
(6) Tong Tong reads a book, The Backpack of Wisdom, and reads 30 pages every day. Three days later, the whole book has 58 pages unread. This book has () pages. A, 90 pages b, 240 pages c, 480 pages d, 60 pages
Four, fill in the appropriate number in the space (1× 12= 12 points).
(1) Fill in the table according to the quantity relation of cuboids.
Cubic
Length, width and high surface area volume
9cm 5cm 4cm
5dm 2cm 100cm3
25cm 20cm 5000cm3
(2) Household expenditure statistics.
Food, clothing, utilities, books, newspapers and other totals.
Expenditure/yuan 125 250
Percentage of total expenditure 50% 15% 6% 100%
Verb (abbreviation of verb) fill in the blanks (2× 12=24 points)
The reciprocal of (1) 15 is (); 0.4 is the reciprocal of ().
(2) 0.45 =18 () = 27 ÷ () = () 20 = ()% = () fold
(3) Xiaoming's electricity consumption in June was 125 kwh, less than that in May 126 kwh.
(4) Grade five students *** 100, including 20 nearsighted students. The myopia rate of grade five students is ()%.
(5) Cut a cuboid with a length of 6cm, a width of 5cm and a height of 4cm into the largest cube with a volume of () cm3.
(6) For a manuscript, after the typist Xiao Li typed 75% of the total words, there were 500 words left. This manuscript has () words.
(7) The greatest common factor of numbers A and B is 12, the least common multiple is 72, the known number A is 24, and the number B is ().
(8) Three students jumped rope, Xiaoming jumped 120 times, Xiao Qiang jumped 58 times for Xiaoming, Liang Xiao jumped 34 times, and Liang Xiao jumped ().
A cuboid of wood is 3 meters long. After being cut into four sections, the sum of surface areas is 48 square decimeters higher than the original, and the original cuboid wood volume is () cubic decimeters.
(10) The sum of the ages of the five children is 34 years old, and the product of their ages is 9240. If the five children are of different ages and none of them are over 13 years old. Then, in descending order, their ages are (), (), () and () respectively.
(1 1) A cuboid. Its bottom is a rectangle with a length of 6 cm and a width of 4 cm. Its sides are just square and its volume is () cm.
Six, column solution (5 x 6 = 30 points)
(1) a barrel of soybean oil, the first time poured out 12 kg, the second time poured out 15 kg,
There are 58 barrels left. How many kilograms is this barrel of soybean oil?
(2) Draw the periphery and top of a cubic wooden box with a side length of 10 decimeter. 80 yuan is needed for every square meter of paint. How much does it cost to paint this wooden box?
(3) A can walk the whole journey from A to B in 7 hours, and B can walk the whole journey from B to A in 9 hours. They both started from two places at the same time and walked in opposite directions. They met for hours on the road.
(4) The laboratory is 12m long, 8m wide and 4m high. Now it is necessary to paint the ceiling and walls of this laboratory, except the doors, windows and blackboards of 36m2, with an average of 0.3kg lime per m2, 1kg lime 2 yuan. How much does it cost to paint this laboratory?
(5) To measure the volume of an irregular rock specimen, the students in the experimental group first injected 1 liter of water into a cuboid water tank, and measured that the water surface was 8 cm high, and then completely immersed the rock specimen in the water, at which time the water surface was 9.6 cm high. Please use the observed data to calculate the volume of the rock sample.
There are many workers working on the construction site. At lunch, the canteen stipulates that one worker is only allowed to use 1 rice bowl, three workers are only allowed to share one vegetable bowl, and four workers are only allowed to share one soup bowl. As a result, a * * * used 76 bowls, so how many workers are working on the construction site?