First, write the number directly. (*** 10 point)
760-403= 300÷ 12= 0.5+7.6 1= 2.56-0.37=
25×40= 132÷ 100= 36.3× 100= 98+ 125=
7.2+2.8= 32 1-99= 4. 13-2.8= 3 1×4=
3600÷ 18= 50×60= 26+84= ( 14+25) ×4=
5.4-2.5- 1.4= 8×99+8= 1.7+0.43+3.3= 320×5×2=
Fill in the blanks. (***22 points)
1.(3 points) 80560320000 pronounced as (); Using "100 million" as the unit is equal to (); The mantissa after omitting "100 million" is approximately equal to ().
2.(2 points) 8.06 consists of () one and () 0.0 1.
3.(6 points) 3 square kilometers = () square meters
5th 12 hours = () hours.
3 square meters and 8 square centimeters = () square centimeters
600 cm = () meters
2060 g = () kg () g
86 square meters 60 square decimeters = () square meters
4.(4 points) Fill in the form as required.
3.5 164 12.5048 10 2.0 15
Keep two decimal places and enlarge it by 100 times.
Keep three decimal places, reducing 1000 times.
5.(5 points) Fill in "
786005 ○ 7860 15 150.28 ○ 15.029 4.56 ○ 4.560
4.9 yuan ○ 4 yuan 9 jiao 1 min 3.6 tons ○ 3406 kg.
6.(2 points) 40 ÷ () = 20 ÷10 = 200 ÷ () = () ÷ 50 =1.2+()
Third, calculation. (***32 points)
1. Write the following questions and check them: (6 points)
3250÷25 100-74.5 5.84+3.7
2. Find the unknown χ: (8 points)
3.96+χ= 10.9 χ÷ 134=27
χ- 158=230- 138 15×χ=240
3. Simple calculation: (12 points)
25×32× 125 47×(45+225÷45)
( 100- 1456÷26)×78 48. 14-2.43-7.57
4. Column calculation: (6 points)
What is the sum of the difference between 532 and 379 and the quotient of 192 divided by 4?
② What is the quotient after subtracting 258 from the product of104 and 12 and dividing it by 33?
4. Measure and draw a picture: (7 points)
1. Measure the degrees of ∠ 1, ∠2, ∠3 and ∠4 with a protractor and see what you find. (3 points)
Draw the height of the triangle, and then draw a straight line parallel to the straight line AC at point B. (4 points)
A
B.C.
bottom
Verb (abbreviation of verb) judgment: (put "√" in brackets for the right and "×" for the wrong). (5 points)
1. Decimal must be less than integer. ( )
2.5 kg 27 g =5.27 kg ()
3. In division with remainder, the divisor must be greater than the remainder. ( )
A ray is 546 kilometers long. ( )
5. The parallelogram is a rectangle ()
Sixth, the application problem. (***24 points)
1. A flour mill can grind 62 kilograms of flour per hour. According to this calculation, how many kilograms of flour can five flour mills grind for six hours?
2. Xiao Ming's scores in five math exams are: 96, 100, 98, 100, 96. What is his average score?
Xiaoying bought two books at the price of 7.5 yuan and 9.8 yuan. She paid 20 yuan. How much should she get back?
This school donated books for Project Hope. 256 books were donated in the third grade, twice as many in the fourth grade as in the third grade, and 300 books were donated in the fifth grade than in the third and fourth grades. How many books did you donate in the fifth grade?