Addition: When we bring two or more quantities together to make a large quantity, it's called Addition or Adding. There are two ways to think about how addition works.
adding works in any order
1. look at this calculation. it says that if we add 5 to 2 , we get 7.
2. look at this calculation. it says that if we add 2 to 5 , we get 7.
it's doesn't matter which order we add numbers, the total will be the same