✔ 最佳答案
Of course you can 7x7 = 49
and 49+36 = 85
Don't understand your comment about odd and even. Any numbers can be added whether they are odd or even, makes no difference.
What grade are you in? You need to go back and study addition again.
Try this web site, it may help.
http://www.kidport.com/grade1/Math/NumberSense/Math1_BasicAdd.htm