Maths help for parents of children aged 5 to 11
Free maths worksheet from mathsblog.co.uk
1000 is a very large number for children working in Year 3 and one which is difficult to imagine the size of. The sheet asks how many different ways can two numbers be added to make 1000, using only whole hundreds.To be able to do this children need to be confident with their numbers up to 10 and be able to know which pairs of numbers add up to 10.
As an investigation it is very similar to asking how many ways can 100 be made only using whole tens.
A thousand is a pretty big number to work with and one of the best ways to beginn to appreciate its size is to work with whole hundreds to make 1000.
To be able to do this it is essential to know pairs of numbers which make 10. If these are not known by year 3 then it is essential that they are as soon as possible.
Here is a straightforward worksheet which is more open ended. It allows the child to find two numbers which add up to 100. Some children will work in a well ordered methodical way eg by adding whole tens 90 + 10, 80 + 20, 70 + 30 etc whilst others will choose a more random approach.
Watch out for incorrect sums that add up to 110 eg 45 + 65.
It’s a while since I sent anything up for children in year 3 and for shape so here is a worksheet just for them!
The best way to go about this is to have some plastic or card shapes: rectangles and right angled triangles. If not, the worksheet can be printed out on to card and the shapes cut out.
It is quite possible to make all the polygons mentioned on the worksheet, and in fact an extension activity could be to make a shape with the most possible number of sides.
it is important to let children experiment with shape whilst using the correct language. Don’t be afraid to call a six sided shape a hexagon and remember that the sides do not all have to be the same length – this only applies to a regular hexagon.
Free Y3 maths worksheet: make shapes and describe their features
This free maths worksheet concentrates on writing half kilometres as decimal fractions.
Children in the UK get far less experience at using kilometres than most Euoropeans because we have decided to keep with the mile for most of our longer measuring. Of course this is a nonsense: to start with a system using mm, cm and metres and then switch to a completely different system ie miles does not make any sense at all! Until our road signs are changed there is little hope of any improvement in this situation.
Whilst there are 1760 yards in a mile the much simpler metric system has the easy to calculate 1000 metres in a kilometre.
At this stage children should be beginning to write half a kilometre as 0.5 km but 1/2 km is acceptable. This free maths worksheet concentrates on writing half kilometres as decimal fractions.
Whilst some children may well still be starting with the given number and then counting on with their fingers others will be using more sophisticated methods such as:
A second, quick revision of counting on. Whilst some children may well still be starting with the given number and then counting on with their fingers others will be using more sophisticated methods such as:
to count on 9, add 10 and subtract 1
to count on 11, add 10 and add 1
to count on 8, add 10 and subtract 2
to count on 12, add 10 and add 2
Here’s a very straight forward little revision for children to practise their counting on in the hundreds. In Year 3 many children will still be using their fingers to count on whilst others will be learning to add the number using the facts they already know. As most of these questions cross the next tens boundary this is not so easy.
Getting to know pairs of numbers which total 100
Getting to know pairs of numbers which total 100 is quite tricky and often will be ‘worked out’ from other knowledge. However, some certainly can be learnt, including these pairs which all have 5 as the units.
Watch out for a common mistake when doing this. Many children will make the answer 10 too many, for example saying that 65 needs to be added to 45 to make 100.
Again, if the answers are not known the easiest way to work them out is to count on.
A simple idea which has a lot of maths attached to it. Find or make two right angled triangles (out of card). Then join them together to make a variety of other shapes. A parallelogram can be made as shown on the worksheet but there is another way to make a parallelogram. A good discussion point is that a parallelogram is a special kind of quadrilateral, just a s a rectangle is a special kind of quadrilateral. Hexagons can also be made: remember that a hexagon has six sides, but the do not have to be all equal (that is a regular hexagon). It’s a good idea to trace round the shapes that have been made.
Whilst in year 1 and 2 the expectation is that children will know which pairs of numbers will make 10, by year 3 they are expected to be able to work out quickly pairs of numbers that make 100.
Continue reading “Free Y3 maths worksheet: Complete number sentences”