Best Answer


Not sure what you mean by break apart.

One way to do it in your head if you need to and don't just know it is 27 is to say 3x10=30 which is easy because adding tens is easy for most people.

Now 3x9 is one less 3 then 3x10. That is to say, think of 3x9 as 9 threes, and 10x3 as 10 threes.

So 30-3 is 27

User Avatar

Wiki User

โˆ™ 2009-09-30 18:21:20
This answer is:
User Avatar
Study guides


20 cards

A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

See all cards
835 Reviews

Add your answer:

Earn +20 pts
Q: How can you break apart 3x9 to help multiply?
Write your answer...
Still have questions?
magnify glass
People also asked