3×5= 80-3= 30+49= 6×3= 99-4=

23+8= 4×3= 7+55= 3× 1= 6×2=

4×6= 34-6= 5×5= 4×2= 4×5=

46-6= 6+5= 60-7= 6×5= 67-9=

18+7+9= 2×3+30= 60- 15+7= 2+6+ 13=

5×6-6= 24+7-8= 6×6-9= 5×2+ 19=

Second, fill in.

1. A corner has () vertices and () edges.

2. The red scarf has () corners. The cover of this math book has () right angles.

3. A square has () corners, and they are all () corners.

4. The picture on the right is composed of () line segments.

5. fill in ">", "

4×6○5×5 34-20○4×4 6○3×3

5+ 1605× 62+202× 2 1 m ○50 cm +60 cm

Third, choose the serial number of the correct answer and fill in ().

1. The size of the angle and the length of two sides ().

① Relevant ② Unrelated ③ Uncertain

2. A triangle has () right angles.

① 1 ②2 ③3

3. There are () angles in the picture on the right, in which () is a right angle.

①2 ②3 ③4 ④5

4. In the figure below, "√" is drawn in () to indicate the corner instead of "×" to indicate the corner.

( ) ( ) ( ) ( )

( ) ( ) ( ) ( )

5. Write down the following questions.

62+35= 89-34= 17+79= 90-84=

46+27+ 18= 85-58- 14= 7 1-65+34=

Sixth, draw a picture.

1. Draw an angle with a given point. 2. Draw a right angle with a triangle.

And write the names of the parts in the corner.

3. Draw a triangle, a square and a rectangle on the grid paper.

Seven, according to the order from big to small, arrange the following four corners and fill in the serial number in ().

① ② ③ ④

( )>( )>( )>( )

Eight, look at the graphic calculation.

? Only? individual

□×□=□ □×□+□=□

Nine, solve the problem.

1. Buy one, pay 50 yuan and ask him for 38 yuan. How much is one?

Dad is 35 years old, 28 years older than Xiaoming. How old is Xiaoming?

How much did dad spend on a football and a pair of sports shoes?

28 yuan, 63 yuan.

On Sunday, Xiao Ming and four classmates went to the zoo to play. Children's ticket to the zoo per 5 yuan. They took 30 yuan. Is there enough money to buy a ticket?

5. Xiaohong origami crane (hè), folding 4 pieces every day for the first 3 days, and then folding 5 pieces. She * * *

How many paper cranes have been folded?

Use your head: (additional questions 10)

1. Count the angles.

( ) ( ) ( )

2. A cube has () faces, each face has () right angles, and the cube is * * *.

There are () right angles.