Accessible Page Links




Page Tools

Main page Content

Mental Strategies for Maths - Split

Mental Strategies for Maths
There are three main strategies we are teaching to help students to do this.
1. Jump
2. Split
3. Compensate.
We teach the students that it doesn’t matter which strategy they use, as different ones work for different people and for different types of sums. The idea is to understand the different strategies and choose the one that works at the time! Last Newsletter I shared the Jump Strategy. This time it’s the Split Strategy.
 
Split Strategy – numbers are split into their place value parts. The place value parts are added or subtracted.
# Addition - 45+38 - a student might think: (40+30)+(5+8) which is 70+13 which = 83. Addition - 45+38 - a student might think: (40+30)+(5+8) which is 70+13 which = 83.
# Subtraction - 76-33 - a student might think: (70-30)+(6-3) which is 40+3 which = 43.
 
When subtracting if the value in the ones place is larger in the number to take away, students can split in non-standard ways e.g.
 54-37 - a student might think: 54=40+14, 37=30+7. So (40-30)+(14-7) which is 10+7 which = 17. 54-37 - a student might think: 54=40+14, 37=30+7. So (40-30)+(14-7) which is 10+7 which = 17.
 
How can I help at home?
* Play maths games that involve adding or subtracting eg card or dice games for 1 and 2 digit numbers, add number plates while driving, ask them to calculate amounts at the shops etc.
* Ask your child about the strategy they used to work out the sums and talk to them about the strategy you used. Compare your choices and note that any strategy is appropriate, as long as the answer is the same.
Happy Calculating! If you have any questions aboutt his, come along with your child to the Maths Club, every Friday morning 8am-8:30am in the Library room. Teachers are on hand to answer questions and model strategies, with your child, so you can see firsthand how they use these strategies.