Ionic compounds are made from giant repeating arrangements of positive and negative ions forming a three ... There are usually a large number of these in a lattice and so a lot of energy is ...

Double means two lots of something. There are two ways to double numbers. You can add the number to itself to get a double. You can also multiply a number by 2 to get a double. When you double a ...

Each way of showing the calculation shows part + part = whole. 75 is the whole number and 43 and 32 are the parts. When a number is made up of more than one digit we can use a place value chart ...

Column addition is a way of adding numbers together. It's helpful when you're adding two-digit or three-digit numbers together. When you do column addition, you lay out the numbers you are adding ...

Addition involves finding the total of two or more numbers or amounts. There are different things you can use to help you add. You can use number lines, place value charts and place value counters.

When you count in tens you could use a number line such as this. You could also look at a hundred square. Do you see a pattern? Each multiple of 10 in the grid has a difference of 10. Counting in ...

videoHow to balance your screen time – health and wellbeing online Explains that going online can have positive and negative impacts, so we need to balance our time online and offline.