(First semester of 2005-2006 school year)

Class: Name: Seat Number: Grade:

I. Oral calculation (6 points, attached to the test paper).

Second, fill in the blanks (17).

1, 4 0.25 is (). Half of 2.7 is ().

Eight times of 1.25 is (). Three tenths of 9.8 is ().

The sum of 32 1.5 is (). 3.72 is () times that of 2.4.

The product of 2.0. 108×2.5 has () decimal places.

There are () 0.07 and 4.48 in 3. 1 17 is () times that of 36.

4.8.296 is an approximate value, with one decimal place being () and two decimal places being ().

5. The fractional part of a () decimal, if from somewhere, a number or several.

The number () appears, and such decimals are called cyclic decimals.

6.80.03 kg = () kg () g 950 cm = () m

96.25 Yuan = () Yuan () Jiao () Minute 0.6 hour = () Minute

3 kg 50 g = () kg 52 square decimeter = () square meter.

7. The simple representation of cyclic decimal 82.542542 ... is (), and the cyclic segment is ().

If you keep three decimal places, it is (); Accurate to ten places is ().

8, at 4.3636, 6.04242 …, 5.226226 …, 3. 14 156 …,

2.767543, 8.36695 ..., 5.33 ...,

() is a finite decimal, () is a pure cyclic decimal,

() is a mixed cycle decimal.

9. fill in ">", "

4.5×0.6○4.5 2.76× 1.52○ 1.52

4.32÷0.2○4.32 1.96× 1○ 1.96

8.95÷ 1.5○8.95 3. 12×0○3. 12

5.2×0.8○5.2÷0.8 6.3÷2. 1○ 6.3×2. 1

Third, multiple-choice questions (put the serial number of the correct answer in brackets, 5 points).

The product of 1, 60. 15×0.26 has () decimal places.

① Two, two, three, three, four, four, five.

2. Remove the decimal point of 63.38, and this decimal point is ().

① Enlarge 100 times ② Reduce 100 times ③ The size remains unchanged.

3, 8.5 hours is 8 o'clock ().

①5 ② 50 ③30

4.9.999 Keep two decimal places, which is approximately equal to ().

① 10 ② 10.0 ③ 10.00

5. If the approximate value of a two-digit decimal is 3.6, then the maximum value of this number is ().

①3.64 ② 3.66 ③3.59

Four. Judge true or false (mark "√" for the right and "×" for the wrong, 4 points).

1, integer is greater than decimal. ( )

2.80.6 After expanding 100 times, reducing 100 times is 8060. ( )

3. 16.992 The two decimal places reserved are 16.90. ( )

4. The side length of a square is 4.5m, and the area is18m2. ( )

Verb (abbreviation of verb) calculation (38 points)

1, vertical calculation: (10 point)

1) 0.86×40.5 2) 270.6÷ 1.5

Check calculation: Check calculation:

3) (keep the number to one decimal place) 4) (the quotient is accurate to one hundredth) 5) (decimal representation of business cycle)

2.67× 1.5 0.2223÷0.65 4.2÷0. 18

2. Find the unknown X: (6 points)

X÷0.7 = 1.625 9.53-X = 6.28 3.2×X = 3.84

3. Simple method calculation: (18 points)

1.2×0.25+2.8×0.25 0.65× 104 3.2× 1.25×2.5

1.25×8.08 5.6÷0.35 16.8÷40÷0.25

5. Only in form, not counting: (4 points)

What is the quotient of (1)2.34 divided by the product of 0.8 and 7.5?

216 times a number is 27.2. What is 2.5 times this number?

Six, practical operation: (10)

Draw a rectangle with a width of 2.5 cm and a length of 1.2 times, and calculate its perimeter and area.

Seven, the application problem (20 points).

1. An artificial earth satellite flies about 499.2 kilometers per minute. 1.How many kilometers can you fly in 5 hours?

Two trains start from two opposite directions, A and B, and meet on the way after 4.2 hours. As we all know, every small local train

When traveling at 80 kilometers per hour, the speed of the express train is 1.5 times that of the local train. How many kilometers is it between A and B?

Relationship: Formula:

3. Using 9 1.2kg peanut can squeeze out 30kg peanut oil. Now to squeeze 500 kilograms of peanut oil, you need

How many kilograms of peanuts?

4. 1 yuan HKD can be converted into RMB 1.062 yuan. /kloc-how much RMB can I exchange for 0/000 Hong Kong dollars?

/kloc-how much can I exchange for 0/000 RMB?

The fifth grade mathematics unit 1 oral calculation examination paper

Class name and student number

30×0.5= 0.78×0.2= 340- 127=

10÷0.05= 3.92+3.79= 629- 138=

29.2-6.5= 2.8- 1.9 1= 3.4×2=

3.9×20= 3.2+0.27= 0.5×0.28=

3.6÷0.02= 24×9= 2.5+5.6=

0.8×0.9= 1.5×8= 2.8÷0.4=

3.9-2. 18= 0.35×7= 5. 1÷ 1.7=

720÷20= 1.5×5= 3.2÷4=

2.6×4= 8-0. 125= 72.6÷6=

0.38+4.92= 3.4×5= 70.7÷7=

3.8÷0.2= 1.23+3.46= 23.5-(3.5+6)=

3.6×0.2= 2.5×8= 2.6×3÷2.6×3=

3. 18+0.43= 1.2×25= 25×2.4=

4×0.25= 6.5-0.8= 33.9-2.5-7.5=

1.4×0.7= 5-2. 1= 7.25×4=

3. 18+2.78= 3.75÷0.5= 6.8÷0.25=

6.24-0.38= 3. 14+5.7= 170-25=

3.4×0.7= 3.28- 1.8= 162÷ 10=

0.78-0.39= 3.6×5= 12.7-5+7.3=

0. 125×80= 16.8÷2 1= 1.9×40=