5th grade (10y) + expression of a variable from formula - examples
3400 eggs sliced hens for February and March. We have to calculate how many hens can make 3400 eggs when one hen give 2 eggs a day for 59 days.
The cube has area of base 225 mm2. Calculate the edge length, volume and area of its surface.
The theater has in each row with 19 seats. Ticket to the first 10 rows is for 30 USD. In next rows is for 15 USD. The theater was completely sold out. Revenue was 12255 USD. How many rows are in the theater?
Rectangular playground is fenced with 38 m long netting. Its width is 7 m. Calculate its length.
Rectangular floor of living room has a length 5.4 meters and a circumference 17.2 meters. What is its width?
- MO-Z5-3-66 tiles
The picture shows a square tiles with side 10 dm which is composed of four identical small rectangles and squares. Circumference of small square is five times smaller than the circumference of the entire tile. Determine the dimensions of the rectangle.
Determine the value of the following exspressions: a) (23-25)·(4-5) b) (97-123):(18+8)
- Perimeter from area
What is the perimeter of the square if its content is 64 cm2?
- Apples 5
In six crates are 45 kg of apples. In five crates were the same amounth and in one crate was 3 kg of apples more. How many kg of apples were in each crate?
Peter spent a quarter of his pocket saving. He has 9 euros now in his wallet . How many euros spent?
A bottle of wine costs 21 euros; and wine is 20 times more expensive than a bottle. How much a bottle cost?
- Bread to kilos
They brought in d two kilos and t three kilos of bread to the store. By the end of the day, 14 two-kg bread were sold. How many kilos of bread remained in the store by the next day?