Search Results For “multiply and divide by 10”

Several ways to investigate the relationship between addition and subtraction.

More adding multiples of 10 to 2-digit and 3-digit numbers. The units remain the same in these questions.

Taking 15, 16, 17 or 18 from 2-digit numbers. The easiest way of doing this is by taking a whole ten and adjusting.

Finding the difference between two numbers as well as making subtraction number sentences from the numbers given.

Remember that subtractions can also be done by subtracting the nearest whole ten and adjusting.

Here we have some serious 2-digit addition. On the first two pages the answers all come to just more than 100.

A mixed selection of adding and subtracting multiples of 10.

Subtraction by compensation means taking away more than you need and then adding some back. It can be quite an effective way to subtract.

Subtraction by decomposition is the way most adults are familiar with and is the way that children will ultimately use for larger numbers. Here is an introductory exploration of the idea.

Progressively harder doubling and halving; from teens, to 2-digit multiples of 5 to 3-digit multiples of 10.

A variety of written questions which need a good knowledge of 2x, 3x, 4x, 5x and 10x tables to answer quickly.

Our third set of tables squares. At this stage we are just looking at 2x, 3x, 4x, 5x, 6x and 10x tables, so not too bad!