Doubling numbers is a powerful math skill. Doubling can help solve a multitude of problems be they addition, subtraction, multiplication, division...
I'll try doubling 13. 13, 26 (two 10s + two 3s), 52 (two 20s + two 6s...40 +12 or 40 + 10 +2), 104, 208, 416, 832, 1664, 3328 (had to think about that one for a moment!), 6656, 13,312, 26,624...
Try to think about why some numbers are easier to double than others. What strategies make the tougher ones manageable?
Try doubling 16 until you run out of MENTAL strategies....What have you got to lose?
Peace,
T-Cubed
14 comments:
Wow, Tom this is really cool. I sat down and doubled numbers for hours! How fascinating!
Peace,
Tom
How lucky are our kids that they have a teacher like you? I think you could have even taught a drama queen like me.
KK
Tom, Love the site - may not be able to do the Math here but love the site!
I want you to know -- this weekend I was using an open number line in my head and my mother picked on me because I was slower than her (she was regrouping, I guess) to figure the math. I COMPLETELY blame the fact that I was also driving, but I was impressed that I instinctively chose that strategy vs. the old algorithm! I can see my math thinking changing!!! :) Love your site!
Tom,
Your love of Math is contagious!! This site is awesome for kids(and grownups too :)
Tom - you have developed a wonderful blog site for kids and adults to enjoy. Love the pups.
Maria
Tom,
Wow...I didn't know you had taken that next step into the technology world. How great is that! J said hey...she wants to know what you are wearing and where you were for that picture??? Anyhow, the blog looks great. I'll have to keep it on my reader so that I continue to deepend my own math skills.
Debbie
Love your site. That guy Tom that left your first comment is an awesome teacher. Can't wait to work with him this year.
I am so excited that you have delved into the world of blogging! What a treat for us all! dayle
WOW, 'Rainman' - You ROCK to the 3rd power!
Love the site. ~ Patricia
16 yeh. Started with 10+10+12=32. Could do 20+20-4-4=32 or 20-4+10+6=32. Counting by 5's doesn't naturally stand out to me here. Noticed no one else tackled your challenge :) The kids (and parents) will love reading and thinking through your blog questions! Proud of you!
Suz
Tom,
You are way out there. I want to be just like you! Keep up the grand work!!
Sherrie
soon to be Mrs. Harry J. Rabe, Jr.
Tommy-Two-Tone,
You are one of the most creative people I have ever met! What an awesome approach for helping others (kids and adults!) to think differently about math! Your writing is very empowering! Keep up the awesome work! You "ROCK"!
Angelica :-)
I feel like I have my own private math tutor accessible! I hope this blog is around when Shalyn is in school! -Haley
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