Move each digit one place to the right to divide by 10, two places to divide by 100; including the ones moving across the decimal point into the tenths.

More doubling and halving of decimal fractions and multiplying a decimal fraction by a single digit.

Square roots and cube roots. Only a very few numbers have a cube root which is an exact whole number. One way to find the cube root of a number is by trial and improvement.

Revision of the main concepts involved with the mental division of numbers. A reminder that a fraction is like a division sum.