Видео с ютуба Easy Tricks Math

How to Calculate Faster than a Calculator - Mental Math #1

Multiply Numbers in 1 Second – Faster Than a Calculator! (Mental Maths Trick)

Square any 2 digit number in 3 seconds I Crazy Math Trick

Mental Math Tricks - Addition, Subtraction, Multiplication & Division!

Trick To Always Remember Your Times Table (6 to 10)

Square Root in 3 seconds - Crazy Math Trick

5 простых математических приёмов для быстрых вычислений | Математические приёмы на каждый день | ...