Maths practice for 12-year-olds - page 294 of 347
Number of problems found: 6932
- Bracket placement
Add to expression 1 + 2x3 - 4x5:6 a / one pair of brackets so that the result is as large as possible b / one pair of brackets so that the result is as small as possible - Acting
Two locomotives are used in a train set. One locomotive pulls the train and the other pushes it. The pulling locomotive exerts a force of 500 kN on the train, and the pushing locomotive exerts a force of 400 kN. a) Draw a diagram of the described situatio - Speed comparison
Arrange the listed speeds from smallest to largest: Š - The sprinter will run 60 meters in 7 seconds, L - chairlift passes 180 meters in 2 minutes, A - the car travels 35 km in half an hour, H - hippo, during the attack, runs 50 meters in 60 seconds. - Cat show
A total of ten exhibitors gathered at the long-haired cat show. It was exhibited in a rectangular room with two rows of tables, as shown. The cats were marked with different numbers from 1 to 10, and one cat sat on each table. Determine which cat was rate - Expression calculations
Calculate: a / 2 + 3 * 4 - 5 * 4 + 3 b / 2 + 3 * (4 - 5) * (4 + 3) c / 2 + [3 * 4 - (5 * 4 + 3)] d / {2 + [3 * (4 - 5)] * 4} + 3 e / 2 + {3 * [4 - 5 * (4 + 3)]} - Fraction denominator
Write a fraction with a denominator of 200 greater than 0.39 and less than a two-fifths fraction. Write its numerator x. - Electricity payment
The hotel's payment for electricity after non-payment of the original payment was increased by 1.5% to € 2395.40. The original payment was to be: - Class trip
Until VII. B class girls and 15 boys. All the girls and 13 boys went on a trip. It was a total of 92% of the students in the class. How many girls go to VII? B? - Map distance
On a map with a scale of 1:50,000, we measured the distance of places AB = 136 mm. The actual distance between cities A and B is: - Grandfather age
Dasha asked her grandfather, a good accountant, how old he was. He said: If you add 5 to my number of years and divide this sum by six, you will get the same result as subtracting 6 from my number of years and dividing this difference by five. How old is - Passbook amount
Mathias had a certain amount of money in the winning book. He won, and his stake increased by 100%. Mathias used half the money for a trip and donated what he won to his brother Jacob. How much is left in his passbook? - Natural numbers
Find all natural numbers that are twice as much as one-fifth plus nine. How many are there? - Theater tickets
Primary schools in one city received a total of 450 tickets for theatrical performances. The primary school on Košická Street received one-third of all tickets and class VII. And she got two-fifteen tickets. How many tickets to the theater performance did - Ice floe
What is the volume of an ice floe weighing 326 kg? - Gold in seawater
One cubic decimeter of seawater contains 0.000 000 01 grams of gold. How many kilograms of gold is in one cubic kilometer of seawater? - Children at pond
There were more than 40 and less than 80 children by the pond. A fifth of the children took a bath, and a seventh sunbathed. How many children were at the pond? - Fraction addition
Which same integer must we add to the reader and the denominator of the fraction 37/73 so that the fraction equals one-half? - Food supplies
The naval ship had 150 people on board and food supplies for 60 days. The captain took on board 30 shipwrecked sailors. For how many days do they have food supplies? - Map distance On a 1:10,000 scale map, two cities are 8.5 cm apart. What distance in millimeters will these cities have on a 1:25,000 scale map?
- Chickens and kittens
There were chickens and kittens in the grandmother's yard. George found that if she added one more kitten, the number of kittens and chickens would be the same. But if she added five chickens to the original number, the kittens and chickens would have the
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