Learn the 3 times table and its division facts with the resources below. You can take a quiz, practise mental arithmetic and learn a 3 times table song. Need to practise your 5 times table? Then look ...

This ten-key printing manual adding machine has a black plastic top, green plastic keys, and a metal mechanism, handle, and base. The number keys are arranged in a block. To the left of these is a ...

This is the first printing calculator sold. From ancient times, scientists and mathematicians have calculated numerical tables. These tables were often rife with error, both from incorrect ...