2. Move the decimal point 3. 14 by two places to (), and expand it to () times.
7 in the integer part of 3.70.672 means (), and 7 in the decimal part means ().
4, 248200 changed to "ten thousand" as the unit number is () ten thousand. Rewriting 78.56 million into "one billion" is () billion. (Keep two decimal places)
5, an isosceles triangle, the top angle is 1 120, and its two bottom angles are ().
6. Use 4, 3, 0 and decimal point to form a maximum number () and a minimum decimal number ().
7. Multiplicative commutative law () = () is expressed in letters.
8, 0.930, 0.39, 0.903, 0.309, the largest is (), the smallest is ().
9, 6 meters 3 cm = () meters 4.04 square meters = () square decimeter
9.75 tons = () kg 1 ton 500 kg -890 kg = () tons
58 km 7 m = () km 8 m 9 cm -2 m 20 cm = () m.
10, 0.6 1.609 15 yuan, 7.80 yuan, 15.80 yuan.
360 million ○360000000 1.23 tons ○ 1 ton 23 kg.
Second, judge. Multiply l, 0 and any number to get 0, and divide 0 by any number to get 0. ( )
2、35×(7×3)=35×7+35×3。 ( )
3. A triangle with three sides of 4cm, 4cm and 8cm is an isosceles triangle. ( )
One thousandth of 4.7.5 is 0.075. ( )
5, 7.05, 7.0599, with one decimal place reserved, all of which are 7.l. ()
6. An isosceles triangle is an equilateral triangle. ( )
7. The broken-line statistical chart can better show the increase or decrease of data. ( )
Third, multiple choice questions. 1, two triangles with an acute angle of 600 are ().
A, general triangle B, acute triangle C, obtuse triangle D, equilateral triangle
2, the following formula can be used to simply calculate the laws of multiplication and distribution is ().
a，( 125+90) × 8b，52×25×4 C，7.6+0.25+2.4d，(258+45) × 55
3. The numbers of the two formulas in the following group () are not equal.
A, 25× (200+4) and 25× 200+25× 4 b, 36×20 1 and 36× 200+36.
C, 265× 105—265×5 and 265× (105 15 5) D, 25× 174×4 and 25×4× 174.
4. The numbers that don't read "zero" in the following numbers are () a, 807. 17 B, 270.05 C, 400. 1d, 30 1009.
5. In the figure below, () A, 7055 B, 7.05 C, 70.55 D and 7.550 have the same size, and there is no "0".
6. Between1.1and L.3, there is a () decimal a, 1 1 B, 18 C and countless d's, 19.
Fourth, measure, draw and fill in. (8%)
(1) The telecom building below is 450% of the municipal government.
In the direction, the distance is meters.
The city government deviated from the direction of 300 at the bank.
The distance is meters.
The school is 600 meters east of the municipal government and 800 meters away.
Please mark its location.
The municipal government is 450 northwest of Jia Xiaodong, 200 meters away.
Please indicate the location of small business owners (4%)
Fifth, calculate the base camp. 34%
(1) Numbers are written directly. 10%
(79 x 2 1)÷20 = 0.093 x 100 = 0.7-0.47 = 0. 16 x 3.7 = 900- 178- 122 =
4l×40 = 0.49+0.25 = 2-0.04 = 3.4-4.6-2.9 = 72÷6×(5 1+ 19)= 1
(2) Calculation by simple method. 12% 30 1×79 125×72×4 728×79×272×79
8.59+2.57 X 3.43 X 5.47 49.62 X 27. 17- 19.62 1546 I(546-239)
(3) Calculate with recursive equation. 12% 8.37+5.95 one (6.52+3.44) 14× 27 ten 2400÷25
18 ton -9 ton -40 kg-135 ton -6 kg (calculated in decimal) 224+76× 42 ÷ 28
Sixth, solve the problem. 20%
L, the earth's surface area is 51000000 square kilometers, of which the ocean area is 361000000 square kilometers. How many tens of thousands of square kilometers is the ocean area more than the land area?
2. Buy five bags of rice in two kinds of packages in the school canteen, with small bags of 35kg each and large bags of105kg each. How many kilograms of rice do you buy? How many kilograms is the big bag more than the small one?
Xiaohong takes 7 minutes to get to school by bike every day. She rides 155 meters per minute. Xiaoming walks 2800 meters from school to home every day. Who is closest to school, Xiaohong or Xiaoming? How many meters is it?
Buying four pairs of shoes is as much as buying 16 hats. You can buy three clothes and a hat if you buy six pairs of shoes, 45 yuan. How much does it cost to buy a dress? How much is a dress more expensive than a pair of shoes?
I won't tell you the answer, do it yourself!