I have just been helping my 6 year old son with his maths homework. One question asked:
“Can you add two odd numbers together to get an odd number? Why?”
There was a single line in the workbook for an answer.
We quickly established that it was impossible to add two odd numbers and get an odd number, but the tricky part was explaining why – especially in such a tiny space.
Luckily, Google came to my aid, and I found this explanation…
“With two odd numbers, each odd number by itself has one left over, but when we add them together, we can combine these two “leftovers” to form another pair.
Any time we add an even number of odd numbers, we’ll be able to pair up the “leftovers” and get an even number for our sum. But if we add an odd number of odd numbers, we’ll get an odd number for a sum. “
Adding Odd Numbers with Dr Maths
So how would you answer the question? More importantly, how would you fit the answer into a single line so that it fits into a six year olds work book?