Posted by Francine on .
How would I explain that it is half of 420?

math 
bobpursley,
5 is 1/2 of ten
so if 10x42=420
then 5x42=420/2=210
Posted by Francine on .
How would I explain that it is half of 420?
5 is 1/2 of ten
so if 10x42=420
then 5x42=420/2=210