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Number sense

on Aug 18, 2011

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Aaron VanderYacht's presentation on learning numbers for his students.

Aaron VanderYacht's presentation on learning numbers for his students.

He wrote a blog post explaining how he uses powerpoint at blog.tutorspree.com

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Number sensePresentation Transcript

• A (Short) History of Numbers
• People have always needed to count
• Three Hundred
Twenty
Six
• Practice – we try
Six hundred thirty four
Eighty eight
Two hundred seven
Nine hundred sixty
• Practice – you try
Five hundred seventy seven
Three hundred and one
Forty two
One hundred eighty
• Numbers keep getting bigger…
Imagine a farmer had this many sheep…
392718327584
• 392,718,327,584
ten
ten
one
one
ten
one
ten
one
hundred
hundred
hundred
hundred
Thousand
Million
Billion
• Try it Out
Five thousand
Five thousand, two hundred
Five thousand, two hundred sixty one
Five thousand and eighty three
• Try it Out
Seven million
Seven million and fourteen
Seven million, four hundred and ninety six thousand
Seven million, four hundred and ninety six thousand, three hundred and two
• YOU Try it Out
Twelve thousand and one
One million, four hundred and seventy two thousand
Thirty nine thousand, four hundred and eight
One billion, seven hundred thousand and forty
• Which number is bigger??
Use place value to figure out the biggest number!
2,000
4,000
20,000
4,000
2,000
400
2,876
4,321
20,123
4,678
2,121
489
• Which number is bigger??
20,402
20,401
2,361
4,359
2,300
2,700
4,821
4,621
212,121
211,489
3,889
4,122
• YOU try it…
834
843
• YOU try it…
10,234
12,324
• YOU try it…
8,094
8,081
• YOU try it…
6,561,234
5,984,745
• YOU try it…
45,782,091
45,091,782
• REVIEW
Three hundred forty seven thousand, two hundred and seven
Write this as a number
-- How did you know where to put the first 3? The last 7?
Where do we add a comma? Why?
Make a number that is bigger. How do you know?
Make a number that is smaller. How do you know?