Mathematics

CCSS.Math.Content.K.CC.A.1:Counting to 100 by ones and by tens

For: Kindergarten

By: Hillary KitchenDue: Tuesday July 16th 2013

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Posttest 2 Posttest 3

Counting to 100 by Ones!

To count from 1 to 100, start at 1 and count to 10:

1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Counting to 100 by ones cont. After learning 1 through 10, count from 11 to

20:

11, 12, 13, 14, 15, 16, 17, 18, 19, 20

Counting to 100 by Ones Cont.

Now it’s easy! 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 Example: -21 “Twenty One”

-22 “Twenty Two”

30, 31, 32, 33, 34, 35, 36, 37, 38, 39Example: -31 “Thirty One”

-32 “Thirty Two”

You can do this all the way up to 100, using the numbers

40, 50, 60, 70, 80, 90.When you get to 99, the next number is 100!

Counting to 100 by Tens!

This is just like counting to 10, like we previously learned, expect you add a zero to show that each group contains 10 numbers.

10 10: “Ten”20 20: “Twenty”30 30: “Thirty”40 40: “Forty”50 50: “Fifty”60 60: “Sixty”70 70: “Seventy”80 80: “Eighty”90 90: “Ninety”100 100: “One Hundred”

Posttest 1

Try it: How many cartoon animals are there?

Correct:

Incorrect:

Posttest 2

How many starts are on this flag?

Correct

Incorrect

Posttest 3 Counting by tens, how hearts are there?

Correct

Incorrect

References

http://www.corestandards.org/Math

http://www.youtube.com/watch?v=kTK-ZqQg9Rk

http://www.youtube.com/watch?v=uYRTtwZGwj8

http://teacherexpress.scholastic.com/product-type/class-decor/counting-1-10-chart-9780439499699

http://oceansoffirstgradefun.blogspot.com/2011/07/seabeach-life-numbers-11-20.html

http://graphicriver.net/item/9-animal-avatars/2668912

www.earthlyissues.com

http://www.flickr.com/photos/areabridges/5105537344/

Posttest 1: Yes! There are 9 cartoon animals!

Posttest 2: Correct! There are 25 stars on this flag!

Posttest 3: YAY! There are 50 hearts! (5 groups of 10)

Posttest 1: Sorry, you need to try again.

But first listen to the song one more time, up to 20!

Posttest 2: Opps! Try again.

First, listen to the whole video above!

Posttest 3: Sorry, try again!

But first listen to the counting by tens video again!