# Archives for "May, 2009"

Posted by Peter on 15th May 2009

## Year 4 number worksheet: recognising tests of divisibility for 4 and 5

There are some things which children can learn which can really help them later at High School. Tests of divisibility are a great set of  ‘tricks’ to know and will certainly help any child with their maths in the future. This page looks at divisibility by 4 and 5. Being divisible by 5 means that […]

Posted by Peter on 14th May 2009

## Understand relationships between addition, subtraction, multiplication and division

Not many questions on this page but an impressive number of maths concepts needed to answer the questions correctly. These include: Understanding that addition can be done in any order so: 50 + 15 = 15 + 50 Understanding that 45 – 31 is different from 31 – 45 Understanding that addition reverses subtraction, ie […]

Posted by Peter on 13th May 2009

## Year 2 maths worksheet: finding halves (pg 2)

The third in our mini series of fraction maths worksheets. This looks again at halves and finding half of a set of objects, keeping to small, even numbers. The best way to re-inforce this work is to carry out practical activities, dividing groups of objects into two equal groups – make sure you keep to […]

Posted by Peter on 12th May 2009

## Mental arithmetic: Subtracting single digits from multiples of 100 and 1000

A pretty straightforward worksheet in two parts. The first part looks at subtraction of a single digit from multiples of 100. The second half looks at subtracting from multiples of 1000. The obvious way to do this is to count back, but when you ask children who are very quick with maths they seem to […]

Posted by Peter on 12th May 2009

## Coming soon: mental arithmetic on subtraction and division

Good luck to all those taking SATs. We have some great mental arithmetic stuff coming up soon, including worksheets on how to divide by 4 mentally and subtracting single digits from multiples of 100 or 1000. Another interesting post will be on rules of divisibility for the numbers 4 and 5.  Also we will be […]

Posted by Peter on 11th May 2009

## Mental arithmetic: Dividing by 4

A nifty way of dividing a number by 4 is to halve the number and then halve again. This method is much easier with even numbers and, of course, whole multiples of 4, but can be used for most 2-digit numbers – just the remainders become tricky. All these questions are multiples of 4 so […]

Posted by Peter on 9th May 2009

## Multiply by 9 mentally (1)

You can multiply most 2-digit numbers by 9 in your head. The most efficient way is to multiply the number by ten and then subtract the number. For example: 45 x 9 First of all multiply 45 by 10 which is 450. Then subtract 45 from 450 which is 405. This maths worksheet shows how […]

Posted by Peter on 6th May 2009

## Maths worksheet: Moving towards a standard method of division

This is the second division worksheet which looks at the intermediate stage between mental methods of division and a standard method. I am not a great fan of this method but it is used in many schools. The first thing to do, as always is to make an estimate of the answer so that any […]

Posted by Peter on 5th May 2009

## Standard written subtraction with zeros.

Here is another maths worksheet which looks at the standard method of subtraction, often called decomposition. Once again the numbers are small, and many children will be able to work the answers out ‘in their heads’. However, it provides good practice with the method, whilst not having to worry too much about the size of […]

Posted by Peter on 5th May 2009