1. Estimate:

207+59260 1-209803-598 1000-88

Which of the following questions has a result greater than 500? Tick "√" in □

695-203□908-275□530-30□

2. Use vertical calculation (the last two questions should be checked)

1000-537=354-273=503-409=

142-59=506-397=434-343=

Second, fill in one.

1. Two three-digit numbers consisting of 0, 4 and 8 are () and () respectively, and their difference is ().

2. A triangle has () angles, including () acute angles. The degree of acute angle is higher than right angle (), and the degree of obtuse angle is higher than right angle ().

3. A basketball player is 193cm, that is, () decimeter.

4. Fill in ">" in ○. 、“& lt、"="。

1 00cm 1 m1cm10mm 3mm 40mm

On the clock face, the angle formed by the hour hand and the minute hand is a right angle.

6. There are () angles in the middle, including () right angle, () acute angle and () obtuse angle.

7. The number consisting of two "5",1"0" and1"3" is (), the maximum number is (), and the minimum number is ().

8. A certain * * in the picture has () angles, including () right angles, () acute angles and () obtuse angles.

Third, multiple choice questions

1. A triangle has at most () right angles.

○ 1 1○22○33

2. 10, the angle formed by the hour hand and the minute hand on the clock face is ().

1 right angle 02 acute angle 03 obtuse angle

3. Xiaojun goes to school from home to the northwest, and he goes home from school to ().

1 northeast 02 southeast 03 southwest

There used to be 26 passengers on this bus. At the park station, 12 people got on the bus and 8 people got off. There are more passengers on the bus now than before ().

○ 1 decrease by 4 persons ○2 decrease by 8 persons ○3 increase by 4 persons.

Compared with the right angle on the blackboard, the right angle on our triangle is ()

○ 1 The right angle on the blackboard is big. 02 The right angle on the triangle is small. 03 is as big as two.

Fourth, solve the problem:

1, the original price of a coat is 307 yuan, and the current price is 198 yuan. Can you work out how much this coat is discounted?

2. Mercury said: It takes me 88 days to go around the sun. Mars said: I go around the sun for 599 days longer than you. How many days does it take for Mars to go around the sun?

3. There are 4 16 students in grade 6, which is less than that in grade 1 1 18 students. How many people are in the second grade?

A sewing team transported 728 meters of cloth, 356 meters for making clothes and 340 meters for making pants.

(1) How much rice cloth does a * * * use? (2) How much rice cloth is left?

5. There is a piece of paper in the shape of Zhang Zhengwen. Cut a knife in a straight line as required. Please draw it separately in the text shape.

(1) requires the rest to be right angles.

(2) The rest are required to be right angles and obtuse angles.

(3) The rest are required to be right angles and acute angles.

(4) The other requirements are right angle, acute angle and obtuse angle.

Smart house:

1, and fill in the appropriate number.

2. There are () angles in the picture below, including () right angles.

3. Obviously, when doing a subtraction problem, the 0 in the minuend was copied into 6, and the result was 163. What's the correct number?