134k views
5 votes
How can 9+3 =12 help you solve 12-9?

User Vandale
by
6.6k points

2 Answers

5 votes
Well you know that 9+3=12 so you can reverse it and do 12-9=3 .Because 3 is the only one left in the equation of 9+3=12.
User Bbrodsky
by
6.6k points
0 votes
9+3=12, 12-9=3, since those three numbers are in the first equation.
User DiligentKarma
by
7.1k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.