Khan Academy Maths. From kindergarten to calculus, Khan Academy is here to help.
Sharpen your skills with over 100,000 interactive exercises. Over 100,000 interactive exercises. You may have heard about our videos, but did you know that Khan Academy has fun interactive math exercises that cover skills ranging from counting to calculus, grade by grade? Every exercise has step-by-step hints, so your child can practice as much as needed. Integral Mathematics Resources. MyMaths - Bringing Maths Alive. United Kingdom Mathematics Trust. History of maths app. Theory and Practice in Maths. Maths Pedagogy. How Big is Infinity? Interactive Lesson. We mentioned that the square root of two is irrational.
Prove that this is so. Here are some hints. Start by supposing that the square root of 2 is a fraction. Put that fraction in lowest terms, say, p/q, where p and q have no factors in common.