25× 12= answer

1-0.8 = answer

10-0.9 = answer

3.2+5.87= Answer

4.7÷ 100= answer

4.27+6.83= Answer

0.8100 = answer

6.7× 10= answer

0.35× 1000= answer

Fill in the blanks.

1, 4 1/9 is ().

The counting unit of 2.0.0 12 is (), and it has () such counting units.

There are () one tenth and () one percent in 3.2.7.

4. An angle greater than 90 and less than180 is called ().

5, 5 tons and 6 kilograms = () tons

6.8.35m = () m () decimeter () cm

7, 726000 rewritten as "ten thousand" as the number of units is ().

8. 107000000 is rounded to "100 million", which is approximately equal to ().

9. The law of multiplication and distribution is expressed in letters as ().

Third, the judge.

1. In division, 0 cannot be divided. ( )

2. Divide 1m into four parts, each part is its 1/4. ( )

3. If the decimal point is moved two places to the right, the original number will be expanded by 100 times. ( )

4. Add three zeros at the end of 7. 1 to enlarge the number by 1000 times. ( )

5, 9.95 accurate to the tenth place is about equal to 10. ( )

Fourth, select the correct serial number and fill in ().

1, 4.03 magnification 100 times is ().

A.0.043

403 years

C.40.3

2, 0.72 equals ().

A.7.2

B.72/ 100

C.0.720

3.70. 142 is pronounced as ().

A: 70: 142

B.70. 142

C.7 142

4. A vertical line can be drawn between two parallel lines.

A. 1

B.3

C. countless

5. Arrange the following figures as required.

1.78 、2.072 、 1.708 、 1.87、 1.807

()& lt()& lt()& lt()& lt( )

Sixth, find the unknown X.

40-X=4.0 1

X+8.07= 13.047

X×78=84240

X÷ 1.3=325

Seven, use a simple method to calculate the following problems.

3.74+24.38+6.26+ 15.62= answer

70-2.085-0.9 15 = answer

67×34+34×33= answer

62.8× 10 1= answer

Eight, the calculation of the following problems.

76.102-18.147+2.078-0.07 = answer.

204× (600-432 ÷ 27) = answer

Nine, application questions.

1. The cement plant originally planned to produce 78 1.5 million tons of cement throughout the year. Therefore, 543,200 tons were produced in the first half of the year and 478,600 tons in the second half. How many tens of thousands of tons exceeded the plan this year?

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2. The master and apprentice produced 894 parts in 6 days, and the master produced 8 1 piece every day. How many pieces do apprentices produce every day?

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3. Two trains, A and B, leave from two cities, East and West, relatively simultaneously. The running speed of a train 128km, and the running speed of b train 169km. Eight hours later, the distance between the two lanes is still 15km. How many kilometers is it between East and West?

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