First, the knowledge base. (***26 points)

1. Fill in "m" or "cm" in (). The thickness of a book is about 1 () The height of a wardrobe is about 1.

2 () 2.7× 3 =□, which means that item () of () is added, and it also means that item () is added to get (). The multiplication formula of calculation is ().

3. Any corner has 1 () and two (). 4. With three digital cards of 2, 0 and 8, you can form () different two-digit numbers. 5. What is the maximum number in ()? 6×()& lt； 35()×4 & lt； 30 5 1 = " " & gt； 8×( )

6. put ">" in ○. "<" or "=". 35 cm 3 m 8× 3× 6× 4 76-40× 5× 78 m 80 cm 3+3+4× 3× 4 7× 9-9× 6× 9

7. Wenwen holds an apple and a pear in both hands, but there is no apple in her left hand, so she holds () in her left hand and () in her right hand.

8.66 cm -34 cm = () cm 66 cm +34 cm = () cm = () m

9. Draw ○, so the number of ○ is twice. You should draw () ○. _________________________

10. There are 80 apples in the fruit shop. I sold 22 apples on the first day, 29 apples on the second day, and there were about () apples left.

Second, the trial court.

(Draw "√" correctly and "×" incorrectly) (* * 5 points)

1. The school playground is about 100 cm long. ()

2. Both factors are 5, and their product is 25. ()

This figure is symmetrical. ()

4.4× 9 and 6×6 have the same numbers, but the formulas are different. ()

There are four corners and four line segments in the picture. ()

Third, calculate the park. (***33 points)

1. Count with me. 51+9 = 63-6 = 6× 3 = 9× 2 = 83-30 = 5× 4 = 6× 5 = 7× 6 = 8× 7 = 9× 8 = 36+60 = 25+8-7 = 6× 6+6. (Write only) 5× 7+15 = 9× 6-14 = 78-23+19 = 57+15-36 = 29+32+28 = 89-2655. (*** 10) 1. Who saw the picture on the right? (Connected)

2. First estimate the length of the knife (longest), then measure its actual length, and then draw a line segment twice its length according to the actual length. Estimated length, measured length. Draw a line segment: draw the other half according to the symmetry axis. What does it look like? 3. Draw a picture.

Five, life camp. (***26 points)

1. A rectangular frame has four right angles. How many right angles are there in five such frames? Where is frame nine? 10?

2. In this year's Beijing Olympic Games, China won 5 1 gold medals, and the last Olympic Games won fewer 19 gold medals than this year. How many gold medals did China win in the last Olympic Games? (2) How many gold medals did * * * win in two sessions? Xiao Lin, I got 8 points in the exam. Xiaoqing Xiaodong, my score is four times that of Xiao Lin. I got 24 points.

3. Round robin. (1) How many points did Xiaodong get? (2) Can you ask one more question? Please answer.