1, 2 1.52 m = () m () cm 5 km 200 m = () km.

2.0.8 has () 0. 1, and 0.47 has () 0.0 1.

3. The first digit to the right of the decimal point is (), and the third digit is ().

4. The top angle of an isosceles triangle is 80 degrees, and the bottom angle is () degrees.

5. All equilateral triangles are () triangles, each angle is () degrees, and all three sides are ().

6. The top angle of an isosceles triangle is 56 degrees, and the bottom angle is () degrees.

7 The broken-line statistical chart can not only show the number of (), but also easily see the number of ().

8. The clock strikes 6 times at 6 o'clock, and it takes 10 seconds to knock it out; When it hits 12, it takes () seconds.

2. What algorithm is used to write the following formula?

1.45×26=26×45 2.25×7×4=25×4×7

( ) ( )

3. 14×8×5=8×( 14×5) 4.20×7×5×3=(20×5) ×(7×3)

( ) ( )

5.25×(4+2)=25×4+25×2 6.76× 10 1-76=76× 100

( ) ( )

7.27×25×4=27×(25×4) 8. 125×(8× 17)=( 125×8) × 17

( ) ( )

Second, the question of right and wrong:

1.0 is divided by any number to get 0. ( )

2.24×96+4=24× 100 ( )

3.25-25÷5×4=0 ( )

Any triangle has three heights. ( )

5. Parallelogram has two different heights. ( )

Fourth, multiple-choice questions:

1.46×25×4=46×(25×4), which is represented by ().

A. Multiplication exchange rate B. Multiplication association law C. Multiplication distribution law

2. When expressing (), the decimal mantissa of 0 cannot be lost.

A. Exact figures B. Approximate values

3. Rewrite 894950 with ten thousand as the unit (), and omit ten thousand as the mantissa ().

A, 8.94 million B, 8.9495 million C, 890,000 D and 8.949 million.

Verb (abbreviation for verb) uses:

Third, the calculation problem: (simple calculation that can be easily calculated)

720÷30-360÷30 150+50×45÷9

3.56-0.95- 1.05 56×23-46×23

6000÷ 125÷8 36×25

4.3×2+5.7×2 35.24-(35.24+8. 16)

Six, application problems:

1. Two road repair teams jointly built a 984-meter-long highway. Team A builds 45 meters every day, while Team B builds 25 meters every day. It has been built for eight days. How many meters did they build? It will be repaired in the remaining eight days. How many meters do you walk on average every day?

2. Every notebook 5.6 yuan, every pen 12.8 yuan. After dad bought these two things for Xiaohong, 20 yuan, how much is left?

3. The number A is 57 and the number B is 5.7. Add two zeros to the mantissa respectively. How many times is the number A greater than the number B?

4. The decimal point of a number is shifted to the right by one place, which is greater than the original number 18. What is the original number? 5. What are the two decimal places that can become 9.6 after percentile?

5. Oriental Primary School has carried out tree planting activities. 1 14 trees were planted in the fifth grade, twice as much as in the third grade. The fourth grade planted 32 more trees than the third grade. How many trees were planted in the fourth grade?

6. A lamp post was buried every 50 meters on both sides of the highway, and 10 lamp post was buried from beginning to end.

How long is this road?

7. There is a road from the school gate to the campus. It is planned that no trees will be planted at the school gate, and then a tree will be planted every 2 meters on both sides of the road. This road 10 meter. * * * How many trees do you need?

8. In gymnastics competition, there are 12 people on each side of the phalanx team standing in the fourth level. How many students are standing on the outermost layer? How many people are there in the whole fourth grade phalanx?

9. This semester begins on February 2 1 and ends on July 3. How many days does this semester last?