Marathon “Fun Math” (for 2nd grade)
Marathon “Fun Math” (for 2nd grade)
Task No. 1
| Pilyulkin gave Dunno 3 tablets and told her to take them every half hour. Dunno strictly followed the doctor’s instructions. How many minutes did these pills last for Dunno? |
Task No. 2
| Misha put 5 coins of 10 rubles into the piggy bank. By how many rubles did Misha’s capital increase? |
Task No. 3
| The dog Sharik photographed the animals with his new photo gun. He photographed each animal 3 times, and took 30 pictures in total. How many animals did Sharik photograph? |
Task No. 4
| In the dark, the mouse saw 6 pairs of cat eyes. How many pairs of legs do these cats have? |
Task No. 5
| The loaf was cut into 4 parts. How many cuts were made in total? |
Task No. 6
| Grandma had 33 candies. She divided these candies between her grandchildren so that each one received 6 candies, and 3 candies remained. How many grandchildren does grandma have? |
Task No. 7
| There are 4 roads from Baba Yaga to Kashchei, and 3 roads from Kashchei to Kikimora. In how many ways can you get from Baba Yaga to Kikimora if you need to visit Kashchei? |
Task No. 8
| Santa Claus bought a pack of “Snow Maiden” paper, containing 500 sheets. Weight of 100 sheets is 160 g. What is the mass of the entire pack of paper? |
Task No. 9
| The mass of 3 dozen plums is 1 kg. What is the mass of 6 dozen plums? |
Task No. 10
| Crocodile Gena and Cheburashka sat on the roof of the carriage and counted crows. First, several crows sat on the roof, and then 17 more flew in, and the crows flew in. There are only 14 birds left. How many crows were there on the roof of the carriage at the beginning? |
Task No. 11
| Masha has 2 skirts and 4 blouses. How many different outfits can Masha make from these things? |
Task No. 12
| For one tricycle you need 2 small wheels and 1 large one. How many bicycles can Vintik and Shpuntik assemble if there are 25 small and 25 large wheels? |
Task No. 13
| How much larger is the smallest three-digit number than the largest single-digit number? |
Task No. 14
| How many triangles are there in this figure? |
Task No. 15
| Misha has twice as many "A's" as "B's" in mathematics. How many “fours” does Misha have if he has 12 marks in total? |
Task No. 16
| There are 25 students in class 2B. How many double desks are needed to seat all the students? |
Task No. 17
| Dad, mom and their daughter Masha are 70 years old together. How old will they be together in 4 years? |
Task No. 18
| You have 10 fingers on your hands. How many fingers are there on 8 hands? |
Task No. 19
| Winnie the Pooh decided to put up a fence. He placed 8 pillars in a row, the distance between them being 2 meters. How long is the fence? |
Task No. 20
| The girl traveled from Moscow to Krasnoyarsk for 53 hours. How long will it take 3 girls to travel from Moscow to Krasnoyarsk? |
Good luck!
Metasubject Olympiad
Hedgehog
The hedgehog is a small predatory nocturnal animal (body length 20-30 cm, weight 700-800 g) with a short tail (length - 3 cm). It lives mainly in mixed and deciduous forests, but also penetrates the taiga and steppe. Hedgehogs can be found in neglected gardens, parks and even in grain fields bordering the forest. During the day it hides under a pile of brushwood and leaves, among bushes, and at night it comes out to feed. During the night, the hedgehog sometimes travels up to 3 km. In the dark, he finds food with the help of his subtle sense of smell, although vision and hearing help him to a certain extent. Its food includes beetles, earthworms, woodlice, mollusks, newts, frogs, toads, lizards, snakes, mice, voles, shrews, as well as berries, acorns, fallen ripe fruits of apple trees, pears and other trees.
It has been established that a hedgehog can detect the presence of an edible beetle at a distance of 1 m by smell, and the approach of an enemy (for example, a dog) at a distance of 9 m.
In the spring in April, the hedgehog gives birth to 5-7 blind hedgehogs with soft whitish needles, which she feeds with milk. The cubs are in a nest built by the female in the form of a hut made of dry leaves, brushwood, and moss. After 1.5-2 months, the hedgehogs leave the nest, but begin independent life only late in the fall.
The importance of the hedgehog cannot be assessed unambiguously. It can be both useful and harmful. It causes harm by eating beneficial insects (bees, carrion beetles), chicks and eggs of birds nesting on the ground. At the same time, the hedgehog brings benefits by destroying pests such as beetles and their larvae, caterpillars and sawfly pupae, and eating poisonous insects.
Last name, first name _____________________________, class____________
Exercise 1.
Start reading the text. Read the text to the end.
Task 2.
Find in the text a sentence containing the answer to the question “How is a hedgehog useful?” Write him off.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Check your entry and correct it if necessary.
Task 3.
Place
+
in next to words in which all consonant sounds are soft.
vision trees live
mice target autumn
Task 4.
A large hedgehog was placed on a scale.
What do you think the scales will most likely show? Choose the most appropriate answer and put +
in next to the answer number.
Answer:
The scale will most likely show a weight of about:
| | 1) 80 g; | | 2) 800 g; |
| | 3) 8 kg; | | 4) 80 kg. |
Task 5.
Find in the third paragraph
one
example for each of the spellings indicated in the table. Write them in the table without changing the form of the word. Underline the spelling.
| Spelling name | An example of a word with this spelling |
| 1. Tested unstressed vowels at the root of the word | |
| 2. Unpronounceable consonants | |
| 3. Paired consonants |
Task 6.
In the Kroks language, just like in the Russian language, there are no separate letters for consonants paired with hardness and softness. Guess how the hardness and softness of consonant sounds are indicated in the Kroks language. Write down a few words according to the rules of the “Krok language”.
m *a h* - m i h mal*ch *ik - boy
beetles - ___________________,
five - ____________________
What letters do you think are missing from the Crocs language?_______________
Task 7.
What is the length of a large hedgehog's body including its tail? If the length of a chipmunk’s body including its tail is 22 cm, then which is longer and by how many cm?
Answer: ___________________________________________________
_________________________________________________________
Task 8.
A large hedgehog weighs 750 grams, and a squirrel weighs 300 grams. Who is heavier - 3 squirrels or 1 hedgehog? How long? Solve the problem, explaining the steps.
Answer:
3 squirrels _________________ than 1 hedgehog, per ___________ g.
heavier or lighter? write down the number
Task 9.
It has been established that a hedgehog can detect the presence of an edible beetle at a distance of 1 m by smell. Underline all values equal to 1 m:
1000 cm, 10 dm, 100 km, 100 mm, 110 cm.
Task 10
. How many months do you think it takes for hedgehogs to leave the nest?__________________________________________
What age will the hedgehogs be in 93 days? _______________________________________________________
Task 11
. Write down what the hedgehog eats?
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________
| Exercise | 12. | What do the numbers in the text mean? 20 – 30cm __________________ 5-7 _______________________ 3 km _________________________________ What |
