Term 1 week 3 2020

Ms. smith brought 85 water balloons
for the water fun day
and ms. kyee brought 52 more.
How many water balloons did ms.smith and
ms. kyee buy altogether 85+52=

So this is how i solved this problem i did 80 + 50=130
and then did 5+2= 7

then i added it all together 130+7=137
that is how i got my answer.