First, fill in the blanks.

1 and+16 are pronounced as (),-as ().

2. All negative numbers are on the side of 0 (), that is, all negative numbers are greater than 0 () and all positive numbers are greater than 0 (). Negative numbers are more than positive numbers ().

3. The number less than 0 is (), and () is neither positive nor negative.

4. At 3.7, +2.6, -5, 0,-12%,

Positive numbers have () and negative numbers have ().

Second, the judgment question.

1, there are only four negative numbers between 0 and -5. ( )

2. All negative numbers are less than positive numbers. ( )

All numbers can be divided into positive numbers and negative numbers. ( )

Third, multiple choice questions.

1, -4, -9, -0. 1, the largest number is ().

① -4 ② -9 ③ - ④ -0. 1

2. Fill in the numbers according to the law: 1, -3, 5, -7, ().

① 9,- 1 1 ② 9, 1 1 ③ -9, 1 1

3. If+1200 yuan means income 1200 yuan, () means expenditure 1000 yuan.

① 1000 yuan ②-1000 yuan ③ There is no such figure to express.

4、+4( )? 3, ? 2( )0 。

① greater than ② less than ③ equal to ④ cannot be compared.

5, -5, -45, +7,+1.3,-There are () negative numbers.

① 2 ② 3 ③ 4

Fifth, the operation problem.

1. Draw a symmetrical figure and mark the axis of symmetry. 2. Draw a picture that rotates 90 degrees clockwise around point B. ..

3. Add the following figure to make it a standard number axis and mark it on the number axis:

Sixth, practical application.

The radius of the bottom of a circle is 3cm. What is its area and circumference?

4. Bend a 125.6 decimeter iron wire into a circular iron ring (excluding the interface). iron hoop

What is the diameter of decimeter? How many square decimetres is the area?

There are 360 chickens, 56 geese and 34 ducks in the farm. How many ducks are there?

6.a and B are 800 kilometers apart. A car drives from A to B, which is enough. How many kilometers does it take to get to B? (Draw a line diagram first, and then solve it continuously)

7. There are 2 1 girls in Class 6 (1) in a primary school, which is the number of boys. How many students are there in this class?