Search Results For “multiplication and division missing numbers”

Mental addition and subtraction using decimals to make a total of 1 or 10.

Applying knowledge to add and subtract decimals mentally.

Add twenty and take one is much quicker than trying to add nineteen. But not always!

Some people like to start doubling with the units, others like to start with the tens. It doesn?t matter as long as the method is fast and accurate.

When we are multiplying by a number ending in 5 we can double the number and halve the other number before multiplying (by a multiple of ten, making it easy).

Remember to move the digits two places to the right to divide by 100.

What happens when a number is multiplied or divided by 10, 100 or 1 000?

Looking at the properties of cuboids, prisms and pyramids.

Nets of cubes and pyramids and making 3D shapes from cubes. Using a pinboard to make 2D shapes that obey set rules.

More nets of 3D shapes which can be cut out and folded to make the shapes.

Net of a 12 sided shape, more on nets for a cube and some ideas for tangrams.

Parallel lines are always the same distance apart and perpendicular lines are at right angles to each other.