Belarusian Third-Grader's Math Challenge Solved in Viral Video

Third-Grade Math Problem Solves: A Step-by-Step Guide A recent video tutorial has gained popularity for its clear explanation of two challenging math problems from a Belarusian third-grade exam. The video, created by repetitor_viktoriya, focuses on solving problems involving relative motion and geometry. Problem 4 involves calculating the distance between two cities. Two motorcyclists leave simultaneously from opposite cities, one traveling at 60 km/h and the other at 80 km/h. They meet after 3 hours. The question is: What is the distance between the cities? The video demonstrates solving this problem using a straightforward approach. The solution involves summing the speeds to find the combined speed of 140 km/h, and then multiplying by the time of 3 hours to arrive at the answer of 420 km. Problem 5 presents a geometry problem. The length of a rectangle is 4 cm, and its width is half the length (2 cm). The task is to calculate the rectangle's perimeter and then draw a square with the same perimeter. The video shows how to calculate the perimeter (12 cm) and then find the side length of the square (3 cm) by dividing the perimeter by 4. The video concludes by showing the construction of the square. The video's popularity highlights the need for clear and accessible educational content online. It offers a practical example of how to solve complex problems for young learners.