This is the link for the balance pan and other manipulatives that we were using in class today.
http://glencoe.com/sites/common_assets/mathematics/ebook_assets/vmf/VMF-Interface.html
What was the important thing (what might tend to trick OTHERS up) that you need to remember when solving for an unknown variable?
a - 12 = 21 + 4
Solve the above example and use it to help you explain where OTHERS might get tripped up.
REMEMBER TO INCLUDE YOUR NAME IN YOUR COMMENT!!!
Ivana B.
ReplyDeletea - 12 = 21 + 4
a - 12 + 12 = 21 + 4 + 12
(Note: On the left side - 12 + 12 cancel eachother out. Therefore, whatever the right side equals altogether, that is going to be the variable.)
a = 37
Others may get tripped up when it comes to doing the inverse operations. What we have to remember is that when you add or subtract on one side you have to do the same on the other. For example, when I did the inverse operation I had to add 12 on one side (a - 12 + 12) but, because I did that I had to do the same on the other side to make it balanced (a - 12 + 12 = 21 + 4 + 12). If you do not do the same thing on both sides, it will become unbalanced. This led me to think that the variable is 37 (both sides of the equal sign equaled 37 making it the solution correct).