Homeschool World Forum

Hi,
Thanks for sharing.
I'm glad to see the 11's trick, again. It's the one I have trouble doing in my head. Do you actually do it in your head? Or do you put it down on paper until you get better at it? What about with the other ones you have in the pdf?
My 9 yr old son loves doing math in his head. Sometimes he uses tricks he learned. He uses whatever one is easiest, like you say to do.
It doesn't look like we've learned all of these on your pdf.
Thank you for sharing.
I recommmend parents to learn these tricks along with their children. They are very useful.
I didn't see the trick for multiplying by 5's. Do you know that one?
Just wondering.

Hi Seeking,
Are you doing this adding/subtracting on paper? With pictures? Manipulatives, or are you doing mental math?
Just wondering because we do almost all verbal math problems that we make up. We do have a lot of books about math topics, though.
I like seeing how much fun they have playing around with numbers. It's sad to hear so many others(not you) saying they and their kids don't like math.
Let's keep making it fun.

Does everyone know the 9's trick?

4x9=

Hold up you ten fingers, and put down the corresponding finger.

l l l l l l l l l l

In this case 4.

4
l l l i l l l l l l

You made two different numbers.

4
l l l i l l l l l l
123 1 123456
3 6
36

4x9=36

Works with all single digits but can be used for larger multuplying, just remember to carry.