Rounding Math Equations

L.I to round up numbers to the nearest ten.
I learnt how to round up numbers to the nearest ten. I think rounding up numbers could really help with math because you can solve equations in another way. I learnt this by writing down the math questions and try to solve it by rounding them to the nearest number. Here is an Example: For the first equation is 9 + 6. To solve that we have to see which number is bigger. So 9 is the biggest number. So what is the nearest ten to 9. It’s 10. So now we have to take the 1 from the 6 so 6 takeaway 1 is 5.