Ellie's (Grade 7) Math Blog

An online space for Ellie and any other grade 7 students out there to get help and learn more math!

Sunday, February 05, 2006

Adding and Subtracting Integers

Hi Ellie,

First I've got three "leesons" I want you to read. Then you'll practice your skills using the online quizzes below.

Integers (les nombres entiers) is a VERY important topic. You're going to use them in every math class from now on. The good news is, you probably already know a lot about them. Living in Winnipeg you know the difference between positive and negative temperatures. If it's -5 degrees celcius outside, how much does the temperature have to go up to get to +5 degrees? If you know the answer to that question (I put it at the end of this blog post) then you know two really important math facts:

(1) -5 and +5 are two completely different numbers and
(2) when you figured out the answer YOU WERE DOING ALGEBRA! (See, I told you you're smart. You can do algebra without even realizing it!)

OK, here are the lessons:

The quizzes have 5 questions each. If you refresh the page you'll get a new set of 5 questions, so you can do as many as you like. Also, there is a [Hint] button you can click, if you need it, for each question. Here they are:

Let me know how you do with these quizzes. Are they too hard, too easy, too much? (The answer to the question at the top of this post is +10 (positive 10), "positive" because it went up.)


  • At 2/07/2006 8:04 p.m., Blogger Elly said…


    help me please

  • At 10/23/2007 11:53 p.m., Anonymous Anonymous said…

    how to add integers!!and subtract lol

  • At 12/27/2007 2:01 p.m., Anonymous Anonymous said…

    Look x = yy and so
    yy = x its just like saying
    4+4=8 and 8=4+4
    Get it?

  • At 9/05/2009 3:54 a.m., Anonymous Anonymous said…


    Ur Blog is AWSOME x10

    Can't wait to give it to my friends,so it can help them as it helped me!!

  • At 3/05/2010 3:01 p.m., Blogger Anonymo said…

    Have you had the students play Integer War? Give them a deck of cards. Black cards are positive, Red are negative. Play against an opponent or two. Each person flips two cards and needs to add them (or subtract, once they get the hang of it) and announce the total. The person with the highest sum gets the cards.

  • At 3/05/2010 3:31 p.m., Blogger dkuropatwa said…

    Thanks for the suggestion! Sounds like a fun game.


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