What i have learnt about on my maths

I am going to tell you about what have learnt on my maths. I am doing halving and doubling and that is when you do something like this for exaple so if there is 2x24 so you double 2 and that is 4 and you halv the 24 so that is 12 and that is 4x12 then you go 4x10 witchs that =40 and then you go 4x2 and that = 2 and then you add the awsers together and that = 42. We are learning to paticioning for another exaple 2x13 you have to take away the 3 from the 3 from the 13 and go like this 2x10=20 an then add the 3 back on and take away the 10 so that is 2x3=6 and then you add the ansews together and that sould = 26. That is what i have learnt.