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This video will be useful for parents to help their children understand 5th grade mathematics, for students in grades 6-11 to remember what has already been covered in grade 5, and for the 5th graders themselves to update and structure their knowledge of mathematics. I recommend the books: https://shamilahmadullin.ru/logic All mathematics 6th grade: • All mathematics 6th grade in 1 hour 50 min... What is a natural number 0:00 How to read and write numbers 0:27 Comparison of natural numbers 1:58 Rounding off numbers 4:50 Power of a number 8:19 Order of operations 10:49 Properties of multiplication and addition 13:45 Associative and commutative property of addition and multiplication 13:50 Distributive property 18:03 Divisibility and divisors. Multiple. GCD and LCM 21:45 Prime numbers. Divisibility of sum and product 27:32 Signs of divisibility by 2,3,4,5,6, 8, 9 and 11 33:27 Fractions and parts 39:35 Basic property of fractions. Reduction of fractions 43:22 Comparison of fractions 47:16 Addition and subtraction of fractions 51:14 Addition and subtraction of mixed fractions 54:53 Multiplication and division of fractions 1:01:49 mathematics, mathematics grade 11, Akhmadullin Iskander, mathematics grade 5, natural numbers, rounding off numbers, comparing numbers, fractions, the main property of a fraction, addition and subtraction of fractions with different denominators, mixed number, multiplication and division of fractions, multiplication of fractions, division of fractions, addition of fractions, subtraction of fractions, what is a fraction, comparison of fractions, prime numbers, signs of divisibility, nod, noc, divisibility of numbers, multiplicity, reduction of fractions