1, when calculating 567-67× 5, calculate () first, then (), and the result is ().

2, a number plus 0, get (); Divide 0 by () to get 0.

3. The second digit to the right of the decimal point is (), and its counting unit is ().

4.0.53 contains () 0.0 1. () if one decimal place is reserved.

5.98400200= () billion ≈ () billion (keep one decimal place).

6. Move the decimal point of 3. 14 to the left by two places (), and move the decimal point () to the original number (); If you move the decimal point of 3. 14 by two places to (), the decimal point will be extended to () of the original number.

7. Triangle can be divided into (), () and () according to the angle.

8. When Xiao Ming calculated (28+22) ×□, he missed the brackets, and the calculation result was 358. He found mistakes in the inspection and recalculated. The correct result of his calculation should be

Yes ().

2. True or False: (4 points)

1. An isosceles triangle with an angle of 60 must be an equilateral triangle. ( )

2. There is no largest natural number, but there is the largest decimal number. ( )

3, 5 kg 30 g =5.3 kg. ( )

4. Eight percentage points written as decimal is 0.08. ( )

Three. Multiple choice questions: (4 points)

1. Move the decimal point three places to the right and then two places to the left. This decimal point ().

(1) the size is unchanged; ② Enlarged by 10 times; ③ Reduce 10 times; ④ Enlarged by 1000 times.

2.98×101= 98×100+98×1= 9898, simplified by multiplication ().

This is easy to calculate. ① Distribution Law ② Exchange Law ③ Association Law

3, three line segments in the following groups, can't form a triangle is ().

①2cm 16cm 17cm②3cm 8cm 5cm③5m 7m 9m。

There are () decimal places between 4.0. 1 and 0.9.

1 7 2 8 3 9 4 countless.

Fourth, the calculation questions:

1. Numbers written directly: (4 points)

150×6= 0.72-0.28= 0.57+0.9= 3.8+0. 12=

10-0.09= 5÷ 1000= 10-6.5+3.5= 15? 3? 15? 3=

2. Vertical calculation and checking calculation: (4 points)

3.906+0.66 28.56- 14.76

3. Calculate by simple method: (6 points)

1.29+3.7+0.7 1+6.3 125×89×8 57× 10 1–57

4. Calculate the following questions: (6 points)

72.8-8.6+5.84 400-( 1300÷65+35) 86.7-( 14.3-3.8)

Verb (abbreviation of verb) solves problems: (12 points)

1, the weight of apples in baskets * *180kg. After selling half of the apples, the basket weighs 92 kilograms. How much does a basket of apples weigh? How much does this basket weigh?

The school held a sports meeting. There are 76 participants in the third grade, and the number of participants in the fourth grade is exactly twice that of the third grade. How many people are there in Grade One, Grade Three and Grade Four?

3. A factory transported coal 184 tons, and used coal 15 tons on average every day for the first eight days. The rest is expected to be used up in four days. How many tons are there on average every day?

4. Engineer Li designed a rectangular flower bed with a width of15m for the Citizen Square. Later, he increased the width of the flower bed by 8 meters, so the area of the flower bed increased by 240 square meters. What is the area of this flower bed now?