Maths help for parents of children aged 5 to 11Free maths worksheet from mathsblog.co.uk
Here is another worksheet for subtraction; this time subtracting 9 from 2-digit numbers.
The usual method to do this in your head is to take 10 and then add 1.
So 56 - 9 is done in two steps:
56 - 10 = 46
46 + 1 = 47
56 - 9 = 47
Free maths worksheet on addition from mathsblog.co.uk
Continuing with our series of simple addition of single digits, here are two maths worksheets on adding 7. The ultimate aim is for children to know, off by heart, the answer to any addition of two single digits. This means that they don’t have to think about it, there is no counting on in their heads, they know it and can answer as quickly as if they were asked what their name is.
Free subtraction worksheet from mathsblog.co.uk
Here is a maths worksheets concentrating on mental methods of subtracting a single digit from a teen. Much work needs to be done with subtracting from 10 before moving on to this.
There are really two types of question with these which demand different mental approaches.
The first type: eg 17 - 6 where it is easy to subtract the 6 from the 7 leaving 11. The tens are not affected.
The second type: eg 16 - 8 where the 8 is larger than the 6 is harder.
One method is add on from 8 to 10 (2 which has to be held ‘in your head’) and then count on from 10 to 16 which is easy (6) and add the two together to get 8. It is surprising how often we add on to do a subtraction sum!
A different approach is to know your doubles: knowing double 8 is 16 means the answer has to be 8.
Standard written methods of subtraction worksheets from mathsblog.co.uk
Written methods of subtraction often cause problems for children and it is important to state that a good mental knowledge of numbers is essential if written methods are going to be grasped successfully.
In the UK the standard method of subtraction is often known as decomposition. It should be used when numbers are too large or too awkward to subtract mentally. Remember: mental methods should be the first resort!
The first page of the link shows how the decomposition method works, and is probably the one you learnt at school, although there are other, equally valid methods of subtraction.
4 times table worksheets from mathsblog.co.uk
The 4 times table is a ‘middle of the road’ table which many children never get a secure recall of. It is, of course, double the two times table and all the answers are even.
Remember the danger is that some children are taught that they only need to count up the answers: 4, 8, 12, 16 etc. However, this is not very helpful if a child needs to know what 4 x 9 is; they do not want to have to go through the whole counting up in fours 9 times to get the answer. The whole idea of tables is that they are learnt, off by heart. To do this it is essential to say them out loud:
Moving towards standard written methods of addition: maths worksheet from mathsblog.co.uk
Just one page is not enough for children to become confident with a method, so I have included here a second maths worksheet which uses the ‘moving towards standard written methods’ of 2-digit addition.
With this method the units are added and placed below the sum, mmaking sure the units are in line and the ten is placed in the tens column. The tens are then added and placed below. The crucial concept here is to remember that it is tens which are being added, so there will be a zero in the units column to ensure that the tens numbers are kept in line. Finally the two answers are added.
This method shows clearly what is happening and avoids the potentially troublesome ‘carrying’ of the tens when using the standard written method.
Moving towards standard written methods of addition (2)
10x table maths worksheet from mathsblog.co.uk
The 10 times table is often the second that is learnt by children, usually after the two times table. The reason for this is that it appears to be easy. Before attempting to learn the table children should have had plenty of practice counting up and down in tens.
However, there is a great danger with the ten times table in that many children are told to just ‘add a nought’ when multiplying by 10. This is disastrous to later understanding of place value and does not work when multiplying a decimal by 10 (eg 2.3 x 10 is not 2.30, it is 23).
The whole idea of tables is that they are learnt, off by heart. To do this it is essential to say them out loud:
One times ten is ten
two times ten is twenty
three times ten is thirty
four times ten is forty
five times ten is fifty
six times ten is sixty
seven times ten is seventy
eight times ten is eighty
nine times ten is ninety
ten times ten is one hundred.
Below are two free maths worksheets on the 10x table.
Free maths worksheet from mathsblog.co.uk
Here is another in our series of simple, single digit addition. This time there are two worksheets for adding 6 to a single digit.
These pages can act as ‘brain training’ exercises, to help children get to know the number bonds from one to ten so that they can answer from memory. Knowing off by heart all the additions of numbers from 1 to 10 is a great help with rapid mental arithmetic later.
3 x table maths worksheets from mathsblog.co.uk
The 3 times table is one of the harder tables to learn – the pattern of even numbers found in the two times table is not there: but answers do alternate between odd and even. It is usually learned after the twos, tens and fives.
A good way of checking if an answer is correct is to see if the digits add up to 3, 6 or 9. eg 24: 2 + 4 = 6
Remember the danger is that some children are taught that they only need to count up the answers: 3, 6, 9, 12 etc. However, this is not very helpful if a child needs to know what 3 x 9 is; they do not want to have to go through the whole counting up in threes 9 times to get the answer. The whole idea of tables is that they are learnt, off by heart. To do this it is essential to say them out loud:
One times three is three
two times three is six
three times three is nine
four times three is twelve
five times three is fifteen
six times three is eighteen
seven times three is twenty one
eight times three is twenty four
nine times three is twenty seven
ten times three is thirty
Below are two worksheets for the three times table. A good way to do these is to time them to see how long your child takes.
2x table maths worksheets from mathsblog.co.uk
The 2 times table is usually the first that is learnt by children, usually after a lot of practice with doubling small numbers. There is a danger when only using the two times table that children think of multiplying only as ‘timesing by 2’ or doubling.
Another danger is that some children are taught that they only need to count up the answers: 2, 4, 6, 8 etc. However, this is not very helpful if a child needs to know what 2 x 9 is; they do not want to have to go through the whole counting up in twos 9 times to get the answer. The whole idea of tables is that they are learnt, off by heart. To do this it is essential to say them out loud: (more…)
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