? 3.88+0. 12= 0.6-0.27= 10-0.09= 4.8× 100÷ 10=?

5÷ 1000= 0.5× 100= 10 1×87= 6-0.6 1-0.39=

1-0.0 1= 322-99 = 36×25=? 4.9+0. 1-4.9+0. 1=

2. Vertical calculation and inspection:?

3.906+0.66 28.56- 14.76 ? 3.04-2.645

3. Find the unknown number x:

X+3.06 = 8.06 X-4.6 = 4.6 25.8-X = 17.84？ X×28=560

4. Calculate with a simple method:

1.29+3.7+0.7 1+6.3 528×78+472×78 125×89×8

5. Off-mold calculation:

35× 128+2680÷67 ? 9300-(82+68× 106) ? 8630+(2 10-438÷73)

2790÷(250× 12-299 1)? 72.8-8.6+5.84? 40-(3.5-2.75+0.86)

6. Column calculation:

(1)100 minus 1456 divided by the quotient of 26, what is the result? ② The difference between 80 and 44, multiplied by the sum of 17 and 28,

What is the product of the difference multiplied by 78? What is the product?

2. Operational problems:

1. Go beyond the straight line and draw a known straight line? 2.( 1) Find the height of side A of the left parallelogram.

Vertical and parallel lines. ? (2) Measure that the base of this parallelogram is ()

One centimeter, and the height is () centimeters. (integer)

(3) Measure the obtuse angle of the parallelogram as () degrees.

a

?

Three. Fill in the blanks:

(1) 4000900 pronunciation? ; Write 1.0307 million.

(2) 5950000000 is rewritten as a number written in tens of thousands? Ten thousand, the mantissa after omitting 1 100 million is about

(3) 50.076, that is.

(4) The unit of 0.056 is, what kind of material is it made of? Composed of such units.

⑸ ? 0.6 hectares = (? ) Square meters 4.2 meters = (? ) cm

? 3500 Jin = (? ) 60 cents per ton = (? ) seconds

0.47 is enlarged by 1000 times, and 5.6 is reduced by1000 times.

(7) Arrange the following decimals in descending order.

0.8? 0.807? 0.078? 0.87? 0.78? 0.087

?

5.983 accurate to one place, accurate to ten places.

Levies 258 million kilometers = 1 100 million kilometers? 384,800 kilometers? Ten thousand kilometers (keep one decimal place)

⑽ A decimal, the hundredth and percentile are 5, and all others are 0, written as ().

Read ().

⑾ A triangle with three equilateral sides is called (? ) triangle, also known as (? ) triangle,

Classification by angle is (? ) triangle.

⑿ A two-digit decimal place after rounding is 9.5. The maximum value of this two-digit decimal place is (), and the minimum value is ().

[13] In the division formula with remainder, the quotient is 30, the remainder is 20, and the minimum dividend is (? )。

14. It is known that A÷B= 10 and A+B=396. ? A=(？ )、B =(？ )。

Four. Statistical knowledge:

The following table shows the number of students in the interest group of Peiyuan Primary School. Please fill in the blanks:

Music group, dance group, science and technology group, calligraphy group and chess group.

48 people 18 people, 24 people, 35 people and 30 people

(1) The largest number of interest groups is more than the smallest number (? ) people.

② There are more music groups than calligraphy groups (? ) people.

(3) The number of music groups is the number of science and technology groups (? ) times.

Multiple choice of verb (abbreviation of verb);

(1) In the following formula, whether the first number is divisible by the second number is (? )。

[a? 25÷3? B? 52÷8? c？ 45÷7? d？ 9 1÷ 13? ]

(2) For the following figures, the constant is (? )。

[a? 250? B? 2.50 degrees Celsius? 0.25 D？ 2.05]

(3) A× 99+A = A× (99+ 1) This is based on (? ) for simple operation.

[ ? A. multiplication and distribution law? B. multiplicative commutative law? C. Law of multiplication and association D. Law of addition and association]

(4) Move the decimal point of a decimal to the left by three places and then to the right by two places. This decimal (? )。

[ ? A. the same size? B. Enlarge 10 times C. Reduce 10 times? D. Reduced by 100 times]

5] between 0. 1 and 0.9 (? ) decimal.

[ ? Answer? 7 ? B? 8 ? C . 9？ D. countless? ]

[6] At 5 o'clock, the hour hand and the minute become (? ) degree angle.

[ ? .50 caliber? B? 100 ? c？ 150 D？ 180 ? ]

⑺(? A parallelogram is called a trapezoid.

[a two groups of opposing sides? There is a set of opposing aspects? C has only one set of opposite sides]

At least in a triangle (? ) acute angle, at most (? ) obtuse angle.

[ ? Answer? 1 ? B? 2 ? c？ 3 ? ]

6. Application questions:

1. Sewing group 18 people, with an average of 5 per person per day. 2. In the sports meeting, 3 15 students participated in the gymnastics performance.

A suit, working 25 days in April, can I * *? They are divided into seven teams on average, and each team is equally divided.

How many suits do you want to make? 5 groups. How many students are there in each group?

The PE teacher bought three volleyball and two basketball. The shop sent a batch of fruits, including bananas.

Every volleyball 40 yuan, every basketball 62 yuan. 375 kilograms, 500 kilograms of oranges, every 25.

How much is a * * *? Kilograms are packed in one basket. How many baskets are bananas less than oranges?

5. Xiaoming keeps 25 black goldfish at home, and the cost of raising them is 6. A rectangle with a length of120m and a width of 35m.

There are 10 fish more than three times as many as black goldfish, and there is a wheat field. * * * Harvest 4200 kilograms of wheat, with an average yield per mu.

How many goldfish do you have? ? How many kilograms of wheat are harvested per square meter?

7. A factory used to use 468 tons of water every month. 8. The average score of Chinese and English in Xiaoming's final exam.

What is the original purpose of a year after the water-saving activities are exhibited? The score is 90. After the math scores were announced, it

Now you can increase the water consumption 1 month, on average? Its average score increased by 3 points, and mathematics became.

How many tons of water are saved every month? ? What is the score?