Posted by Francine on .
how could i use the product 10 x 42 = 420 to find the product of 5 x 42?

math 
bobpursley,
wouldn't it just be half of 420?
Posted by Francine on .
how could i use the product 10 x 42 = 420 to find the product of 5 x 42?
wouldn't it just be half of 420?