Marshfields Maths Page
Addition methods, Have a go!
- Using a number line is the first step after using cubes to add smaller number less than 25.
- This is an example which does NOT cross the tens boundary and is an important step to understand and be secure with the method of using columns.
- Once children can add a multiple of ten to a 2-digit number mentally (e.g. 80+11), they are ready for adding pairs of 2-digit numbers that DO cross the tens boundary (e.g. 58 + 43)
- In order to carry out this method of addition:
- Children need to recognise the value of the hundreds, tens and units without recording the partitioning.
- Pupils need to be able to add in columns.
- Start with adding the units, in preparation for the compact method.
- When children are secure with this method move on to the short hand version of compact column addition.
- Decimals work in the same way - remember to use the right unit of measure, e.g. money has a £ sign in the answer.
Subtraction Methods (Take Away!)
- Use number lines.
Count from the smallest numbet to the biggest number to find the difference.
- Expanded subtraction for demonstrating decompostion.
Have a great summer
and try to think about how many times each day
you use some kind of mathematics ….. you’ll be surprised!