Showing posts with label multiplicative inverse. Show all posts
Showing posts with label multiplicative inverse. Show all posts

Scribe Post November 24

Friday, November 28, 2008
Hi, during class today we learned a lesson about multiplicative inverse. We also needed to add work in our barn doors on the division side in the positive & negative section(quadrant 4). To answer a division question with a positive then a negative integer, you must use multiplicative inverse.


hmmmm.....lets do 12 divided by -4. It seems impossible to do right? Well as a matter of fact it is possible. Try to do that question on your calculator. No, don't worry your calculator won't blow up! It works!

From what I understand, there are 4 easy steps to doing Multiplicative Inverse. First write the question using the division sign. Step 2 switch the answer(N) and the first integer and change the division sign to a multiplication sign. Step 3 Find the answer to N. Then fill in the question.



Your probably wondering what's wrong with just using partitive or quotative division. Well I'll tell you what's wrong: They don't work!

Quotative: How many -4's are in +12? It doesn't work because we can't make groups of -4 in a positive number.

Partitive: How many equal parts are in -4 groups when we have +12? It doesn't work either, because you can't draw -4 groups.

Let me think...........................................the next scribe is Maeddah!!!!!!!!!!!!!!!!!!!=P



Chapter 3: One Step equation solving