Search Results For “adding and subtracting”

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Being able to count on and back in tens gives children confidence with numbers.

Practise counting along number tracks, often crossing the hundreds boundary. Notice some of the tracks start at the bottom and go up!

Putting numbers in order, starting with pence and moving on to decimals.

Starting with blank 0-10 number lines and moving on to 0-100 number lines, how easy is it to place numbers accurately?

Rounding the lengths of bridges and rivers, or even birds' wingspans.

Practise finding pairs of multiples of 5 that total 100. There are only about ten pairs and if possible they should be learnt.

Several ways to investigate the relationship between addition and subtraction.

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.

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

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.