Math
posted by Kelly .
My son's math homework asks him to find each product by factoring the tens. 6 x 2, 6 x 20 and 60 x 20. There is no explaination in the book..can you help?

Factoring the tens is a technique for mental multiplication which relies on the fact that 10*n, for any real number n, is easy to compute.
6*2 = 12 is a memory value.
6*20 = 6*2*10 = 12*10 = 120
60*20 = 6*10*2*10 = 12*10*10 = 1200 
6020=20+___

40

1.6x2,6x and 6x200
Respond to this Question
Similar Questions

4th grade
factoring the tens how to find the product using rectangles 
4th grade
factoring the tens how to find the product using rectangles 
algebra
Can someone help me explain how factoring is used to solve quadratic equations? 
Math
My son is grade 4 his homework have question is : when you multiply any number by 1,what is the product ? 
math
find each product by factoring the tens draw rectangles if you need to 
Math
This is a 3rd grade math problem that my son had on homework. Can you explain how to derive the answer for this problem? 
Math
Thanks Ms. Sue for givig me the anser of 11,211 for my son's math problem(I have 10 thousands, 11 tens, 12 hundreds, and 0 ones. What number am I? 
Math
My son's homework asks us to find the product by factoring the tens. The problem is 6 x 2, 6 x 20 and 6 x 200. I see how to do 6 x 2 (memory factor) and the 6 x 20 would be (6 x 2) and (1 x 10) then 12 x 10 = 120 but how does he show … 
math
I don't understand factoring. One of my homework questions asks for that. The question is "The area of a rectangular garden is given by the trinomial x to the 2nd power plus x 42. What are the possible dimensions of the rectangle? 
Math
my son was asked to find each product by factoring the tens, and to draw rectangles if needed to on 6x2, 6x20, and 6x200. I'm not sure how to do this. please help me