Examples of equations for practice for 12 year olds - page 19 of 58
Number of problems found: 1142
- Perimeter 20283
If we increase the length of one pair of opposite sides of the square by 2 cm and the length of the other two sides by 1 cm, we will create a rectangle, the perimeter of which will be 10% larger than the perimeter of the original square. What is the side - Troops
There are two leaders in the tourist group, with an average age of 30 years, and several children with an average age of 10 years. The total age of the group is 12 years. How many children are in the group? - Average 20173
The average of the two numbers is 2.8. One number is 5. What is the second number? - Square sides
If we enlarge the side of the square by a third, its circumference will be 20 cm larger than the original. What is the side of the square? - Equation: 19613
Equation: 6 (x + 1) -4 (2x + 3) = 7 (x-1) +5 (9-x) - Neighboring 19293
Farmers had three harvesters at their disposal during the harvest, with which they would harvest the fields in 9 hours. How long will it take them if two more harvesters from the neighboring district come to help them? - Measures 19263
Jana measures 4/5 of Dad's height. Mom measures 160cm, which is 1/4 less than Dad. What is Jan's height? - Simultaneously 18813
2 ships sail simultaneously towards each other from places 2340m apart. I sail both ships at a constant speed. The first boat travels 56m per minute, and the second 74m per minute. Create an equation that corresponds to the assignment of the task if the u - Bricklayers 18773
According to the standard, we calculated that two masons would plaster the corridor of the new school building in 54 hours. How long would it take for nine bricklayers to plaster this corridor? - Consumption 18743
With the consumption of 0.4 t of coal per day, the supply lasts for 36 days. How many days will the supply be enough if 16 kg of coal is used less daily? - Harvesters 18633
Rope wheat harvests seven combine harvesters in 5 days at total capacity. The weather forecast is required to complete the harvest in 4 days. How many combined harvesters had to be used together? - One-fifth 18623
One-fifth of the girls are honored in the class, and the remaining eight girls are doing well. How many girls are in the class? - Branches 18533
The right triangle has an area of 225 cm². One of its branches is twice the size of the other. Find the lengths of its hangers. - One-fifth 18523
The farmer crossed the daily plan to sow wheat by one-fifth and sow in an 11.4 ha field. Calculate his daily schedule. - Reducing
Reducing the unknown number by 427, we get 65% of its value. What is an unknown number? - Fifteen 18403
Fifteen ants bring 10 g of food to the anthill in 1 hour. In how many hours will five ants carry 1 kg of food? - Approximately 18133
Mr. Kotek drove from Brno to Prague at 11 a.m. at a speed of 80 km/h. His friend drove from Prague to Brno half an hour later at a speed of 85 km/h. Which of them will be closer to Prague when they meet? The distance between the cities is approximately 21 - Twenty-eight 17673
Twenty-eight children participated in the Pythagorean school round. The number of children who ranked only behind Rasťo was twice as large as the number of children who were more successful than Rasťo. How many places did Rasťo finish? - Harvested 17623
The farmer managed to increase wheat yield per hectare by 0.4 tons by improving the soil, so he harvested 140 tons of wheat from 25 ha. What was the original yield per hectare? Please round the result to one decimal place. - Circumference 17533
If we enlarge the side of the square by half, its circumference will be 24 cm larger than the original. What is the side of the square?
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