Archives for "November, 2007"

Subtraction is non-commutative.
When a larger number is subtracted from a smaller number, the answer is negative.

By year 4 expectations are rising as children’s understanding and knowledge increases. The Primary Framework for Mathematics suggests that children should be able to read, write and understand the following words: Take away subtract how many are left? how much less? difference between, how much more? how many more to make? decrease, inverse and the [...]

The work on subtraction facts in year 3 is very similar to that in year 2. Constant practice and re-inforcement is necessary if children are going to become quick in their responses – the numbers do not necessarily have to be larger, but a more rapid answer should be expected. A similar list of words [...]

a number line is really useful for helping children gain confidence with subtraction.

take away, subtract, how many are left, less than, what is the difference between, more than.

Just one maths worksheet with just 8 questions, but be warned this might prove to be tricky for most 10 or 11 years old children. At least two operations are needed to find the answer, and as I have said before this causes most children a fair amount or difficulty. This is where logical thinking [...]

Very similar to the year 4 worksheets on the same subject, this re-inforces and emphasises the importance of being able to explain the methods used to reach an answer. In the ‘Operation’ box the child should put whether to add, subtract, multiply or divide. The ‘Method’ refers to whether it was done mentally, with paper [...]

Which operation is involved in word problems
Whether calculations should be done mentally or with pen and paper.
How to explain and record the operations used in solving the problem.