Maths Focus- 1/ 2 Zikos
This strategy is generally used when they are taking away numbers that are less than 10. It is being able to count back ‘x’ amount to find the answer.
This strategy is counting down from the largest number to get to the smaller number to work out what the difference is. Key is to be able to count backwards by ones and being able to tell the amount counted back not just the number they reached.
Counting up is when the numbers are closer together and you are starting at the smaller number and counting up to the other. The children need to make sure that they are again counting the amount of jumps they are completing in the process.
Partitioning is breaking the number up and knowing what makes up the number.
E.g. 32- 11=
32- 10 = 22
22- 1= 21
We are wanting the children to know their basic doubles as this will help them be able to halve a number. E.g. when asked to halve 82, students can work out that half of 80/8 is 40/4 and half of 2 is 1. Therefore, the answer is 41.