Equivalent Fractions: Missing Numerator

One hundred printable worksheets on finding the missing numerator in a pair of equivalent fractions. There are 1,200 problems in the set and no problem is repeated, so a class can work through it for a whole term without meeting the same question twice. The sheets get harder as you go, starting in halves and twelfths and building to twentieths and twenty-fifths, and each sheet prints its level in the corner so you can pick the right one. Every worksheet is followed by its own answer key on the facing page.