Math Marathon (5th class)

Objectives:

1, To develop and strengthen the interest in mathematics, to motivate cognitive and creative activities, to develop intelligence, curiosity, logical and creative thinking.
2, Expand students' math horizons.
3 Promote the development of a culture of collective work, the formation of friendly and friendly relations.
4, To cultivate in students feelings of collectivism and the ability to combine individual work with collective work.

Equipment:
1. interactive whiteboard;
2. cards with tasks.

Event progress

1 - 5 representatives from each 5th grade take part.

Attention! Attention! invite everyone to the math celebration. Remember to bring speed, resourcefulness and ingenuity! today we suggest you to "compete with math"

2. Warm-up (not evaluated).
Conceive a number (any)
Add 4
Multiply everything by 3
Add 3
Now double the result
Subtract 12
Divide the result by 6
Deduct the intended number
Multiply the result by 4. on the count of 3, call the answer chorus (12).

3. Riddle Competition (correct answer is worth 1 point).
1) She speaks silently, but clearly and not boring, you talk to her more often - you will become 10 times smarter). (book)
2) Black, tailed, does not bark, does not bite, and does not let you from class to class. (two)
3) The first is an excuse, the second is a summer home, and the whole is sometimes difficult to solve. (task)
4) The cunning little brothers live in a difficult book Ten of them, but these brothers will count everything in the world. (numbers).

4, Poets Competition. (5 min), (rated 2.1 points)
You may not be a poet, but a mathematician - you must! It is proposed to compose poems with mathematical content based on given rhymes.

D-pointer,
Multiplication-dizziness,
Mischievous unit,
Circle-friend,
Dot-daughter,
Equation-voltage,
Rogue triangle,
Square facade.

5. Computational relay (2 min). (correct answer is worth 1 point).

6. The Polygon with a Secret Contest (2 min). (correct answer is worth 1 point).
How many triangles are there in a given hexagon   6

7. Think! Think! Contest (correct answer is worth 1 point).
1) Two played chess for 2 hours, how long did each play? (2)
2) Three horses ran 30 km What distance did each horse run? (30)
3) Three different numbers were added, then multiplied. Sum and product were equal. What numbers are these? (1,2,3)
4) A piece of matter 200m long was cut off every day, 20m long. How many days later was the last piece cut off? (9)
5) A snail crawls along the stem of a plant that is 1 m high. During the day it rises 4 dm and at night it drops 2 dm. What day will the snail be on top?  (4)
(6) Parents have 5 sons, each with a sister. How many children are there in the family?  (6)

8) Co?? "Naughty Frogs Course" (Figure 1) (a correctly completed task is rated 1 point).

- 1 team's most attentive player invited to Me Competition is played in turn One player comes out calling in turn "First Frog, First Cat, First Mouse, Second Frog, Second Mouse, etc" looking at a poster showing animals. (7 frogs, 8 cats, 9 mice)

9) Fun Questions Competition (correct answer is worth 1 point).

1. Can multiplication make 0?  (Yes)
2. Unit of mass of gemstones.  (karat)
3. Volume 1 kg of water. (1 liter)
4. What is 13x25*0*9.  (0)
5. What is lighter than 1 kg of cotton wool or 1 kg of iron?  (equally)
6. To a single digit greater than zero, added the same figure. How many times has the number increased?  (11 times)
7. What is 1 pood?   (16 kg.)
8. Formula P rectangle with sides a and b? (P=2(a + b))
9. Smallest natural number.  (1)
10. A number that turns an equation into a true equality?  (root)
11. Can division produce 0?  (yes)
12. An old woman was walking to Moscow. 3 old men meeting her. How many people were going to Moscow?   (1)
13. What is abacus?  (accounts)
14. Part of a straight line consisting of points lying on one side of a given one. (beam)
15. Sum of the lengths of all sides of a polygon?   (perimeter)
16. Path formula.  (s= vt)
17. What do we find if the area of a rectangle is divided by the width?   (length)
18. 5y=30, y = ?   (6)
19. Largest two-digit number?  (99)
20. Hands 10 fingers How many fingers are there on 10 hands?  (50)
21. Multiplication result. (work)
22. One egg is boiled for 4 minutes How many minutes are 5 eggs boiled?  (4 min)
23. Three kittens. How many paws?  (12)
24. 7x8=?  (56)
25. How many minutes are there in one hour?  (60)
26. A rooster standing on one leg weighs 3 kg. How much does it weigh standing on two legs? (3 kg)
27. Smallest two-digit number?  (11)
28. Addition result   (amount)
29. Third month of summer vacation?  (august)
30. First month of winter?  (december)
31. Largest three-digit number?  (100)
32. How many years did Ilya Muromets sleep?   (33)
33. Equality with a variable?   (equation)
34. How many musicians are there in the quartet?  (4)
35. The smallest natural number?  (1)
36. How many kids did a goat with many children have?  (7)
37. The part of the straight line bounded by two points.  (cut)
38. Subtraction result.  (difference)
39. You, yes me, yes you and me How many of us are there in total? (2)
40. How many times do you need to measure to cut once?  (7)
41. What number is considered unlucky? (13)
42. Tenth month of the year?  (october)
43. How many letters are there in the alphabet?  (33)
44. How many letters are there in the word "sun"? (6)
45. How many legs, tails and horns does one cow have?  (7)
46. How many hares should you not chase? (2)
47. There were 5 swans swimming on the lake. 3 of them dived for food. How many swans swam?  (5)
48. The loaf was cut into 3 pieces How many cuts were made?  (2)
49. What month has 28 days?  (in all)
50. The number by which they divide (divider)
51. Multiplication result (work)

{module Yandex}

10. Conclusion.
Congratulations to the winners and participants of the game. You're all great! Wish you to carry your love of mathematics "Queen of All Sciences" throughout your life. Let your ingenuity and strong knowledge help you cope with any mathematical task. And the solutions will be easy and interesting for you. I wish there are no unsolved problems in your life.