Maths practice for 12-year-olds - page 225 of 347

Number of problems found: 6932

Calculate rectangle
Calculate the unknown dimension in the rectangle if you know: S = 51.66 square meters, and = 8.2 square meters
Given
Given 2x =0.125, find the value of x
Evaluate expression 2
Evaluate expression with negatives: (-3)+4+(-8)+(-6)+4+(-1)
Workers 9
If two workers fix two windows in an hour, how many windows can 18 workers fix in the same two windows?
Triangle rectangle area
The triangle has a base of 7 cm and a height of 6 cm. The rectangle has one side of 10.5 cm and the same area as the triangle. What is the length of the other side of the rectangle?
Temperature conversion
The average human body temperature is 98.6 degrees Fahrenheit. What is the temperature in degrees Celcius?
Bun weight calculation
To prepare 40 buns, we need 3 dl milk, 3 dags of yeast, 6 g of sugar, 0.5 kg of flour, 4 spoons of oil, and 1 egg yolk = 15 g. After baking, the buns are filled with filling, for which we need 36 g of cheese, 20 dag of butter, and 200 dag of cream. How mu
Quarter of a circle
Calculate the circumference of a quarter circle if its area is S = 314 cm².
Circle diameter calculation
Calculate the diameter of a circle whose area S = 78.5 cm².
Circle circumference area
Two-thirds of the circumference of the circle is 12π cm long. Calculate the area of the circle.
Collect rain water
The garden water tank is cylindrical, with a diameter of 80 cm and a height of 12 dm. How many liters of water will fit into the tank?
Pool
The prism-shaped pool is 2 m deep, with a bottom of the isosceles trapezoid, base dimensions of 10 m and 18 m, and arms legs 7 m long and 5.7 m long. During the spring cleaning, we must paint the bottom and walls of the pool. How many m² of paint should b
Perpendicular prism
Calculate the volume of the vertical prism if its height is 60.8 cm and the base is a rectangular triangle with 40.4 cm and 43 cm legs.
Isosceles triangle
The circumference of the isosceles triangle is 32.5 dm. The base length is 153 cm. How long is the leg of this triangle?
One hectare
How many square meters are one hectare?
Tractors
Five tractors will plow the field for 8 hours. In 2 hours, one tractor broke down. How long do the remaining tractors complete the plow?
Degrees 2
The temperature was 3°F and fell four degrees Fahrenheit. What is actually temperature?
Difference in temperatures
The temperature in the number line shows minus 15 degrees celsius and 8-degree celsius. What is the difference between the temperatures?
Container
The container-shaped box with internal dimensions of 3.9 m, 3.25 m, and 2.6 m was completely filled with goods in the same cubic boxes. How long edge could this box have?
Cube volume comparison
There are two cubes. One has an edge of 9 dm and the second of 9 cm. How often does the largest cube have a larger volume than a smaller one?

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