Maths practice for 11-year-olds. - page 107 of 224
Number of problems found: 4480
- Cement foundation
How many kilograms of cement are used to concrete the foundations under the machine if the concrete slab has the shape of a cuboid 4.6 m long, 2.7 m wide, and 45 cm high if 250 kg of cement is used per 1 m³? - Block surface calculation
Calculate the surface of a block measuring 1 m, 2 m, and 3 m. - Toy car length
On the Christmas flyer, we find a toy car model reduced in a ratio of 1:43. What is the car's actual length in the picture in decimetres if the manufacturer states a length of 14 cm? - Bike departure time
Vašek is supposed to be at the playground, 2.5 km away from his home, in 15 hours and 30 minutes. If he drives at 50 km/h, what time does he have to ride his bike to be on the field 5 minutes earlier? - Surface and volume
Find the surface and volume of a cuboid whose dimensions are 1 m, 50 cm, and 6 dm. - Wooden box
The block-shaped box was placed on the ground, leaving a rectangular print with 3 m and 2 m. When flipped over to another wall, a print with dimensions of 0.5 m and 3 m remained in the sand. What is the volume of the wooden box? - Pressure vessel
A block-shaped pressure vessel with dimensions of 1.5 m, 2 m, and 3 m is filled with compressed gas. After being released from the container, the volume of the gas increases four times. What volume does the gas occupy after it is released from the contain - Pool water calculation
How many liters of water are in a pool whose width is 12 m, length 25 m, and depth 280 cm if it is filled 10 cm below the edge? What area of the walls wet the water (in m2)? - Equation solving
Solve the equation: (7x-1) / 3 + (5 + 3x) / 2 = 5x - 6 - On Turtle Island
The weather on Turtle Island is unusual. It always rains on Mondays and Wednesdays, it is foggy on Saturdays and the sun shines on the other days. A group of tourists want to come to the island for a 44-day vacation. What day should the vacation start so - Number calculation exercise
Calculate: a) 17 + (-23) - (-42) = b) - 32 - (+12) + (+13) = c) 6.7 - (+ 2.5) - (- 8.2) = d) - 0.56 - 4.38 + 6.78 = - Period interval
The period is between 8:15 and 9:05. The period is to be divided into six parts. How long will it take one interval per second? - Greece trips
People travel to the seaside in Greece for 8-day, 10-day and 12-day stays. An assigned delegate flies there and back with each group of passengers. On May 1, all three groups and their delegates will fly to the sea simultaneously. When will all three dele - Aquarium 20
Martin wanted to help his father glue together an aquarium. He read in the manual that it should have a volume of 45 liters. But he didn't have much space on the table, the bottom of the aquarium could only be 25 cm and 40 cm. How high does the aquarium h - Triangle angle
An isosceles triangle has the size of the angles at the base alpha = beta = 34 degrees 34 minutes. Calculate the magnitude of the angle at the remaining vertex of the triangle in degrees and minutes. - On a
Someday, the Sun, Venus, and the Earth will be in eclipse, i.e., Venus will be between the Sun and the Earth. Venus orbits the Sun in 225 days. In how many years will all three bodies be in alignment again? - Flowerbed grass area
How large should we sow an area with grass in a circular flowerbed with a radius of 4m? - Wheel turn calculation
The wheel has a radius of 31 cm. If we ride 1,168 km, how many times does it turn? - Quadrilateral prism
Calculate the volume and surface of a regular quadrilateral prism with a base edge a = 46 mm and a height v = 0.67 dm. - Juice can level
The juice is sold in cans with a radius of 30 mm and a height of 11 cm. There are 0.25 liters of juice in the cans. How many millimeters below the can lid is the level?
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