Posted by Skyla on .
3,456 in expanded form? 3 thousand 4 hundred and 56? is this right?

3rd grade math 
DrBob222,
I would write this as
3000 + 400 + 50 + 6
Here is a site that explains it rather well. 
addtion patterns 
lena boutros,
2+5=7

3rd grade math 
ashley,
5+4=9 4+5=9 is commutative is this right?

4rd grade math 
Slim,
Maths word form standard form and expand form