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mother stuck on skip counting

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 jailen'smom Guest
jailen'smom

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mother stuck on skip counting
09-19-2007, 12:18 PM
 #1

what patterns do you see with skip counts by 10s and 3s? My daughter had this question tonight on her homework sheet after coloring the numbers she counted by tens on the number chart then circling the numbers when counting by three's. I have no clue.

 Maestra Joined: Sep 2005 Posts: 3,227 Senior Member
Maestra

Joined: Sep 2005
Posts: 3,227
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09-19-2007, 01:05 PM
 #2

Skip counting by 10s on the hundred's chart should make vertical bars. Skip counting by 3s makes diagonal lines. (I think I am remembering this correctly!)

I am assuming you are looking for a visual pattern? Hope this helps.

 momteach310 Joined: Mar 2006 Posts: 2,003 Senior Member
momteach310

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this may sound crazy
09-19-2007, 01:09 PM
 #3

Maybe I am looking at this too deeply ....and this is wierd...but every tenth multiple of 3 is every 3rd multiple of 10. I can't believe a 2nd grader would be able to know this. Let me try and describe it. Write the numbers 3,6,9,12,15,18,21,24,27, 30 horizontally.
Above the 30 write 20, 10. Underneath the 30 write 40, 50, 60.(vertically)
Start a row of multiples of 3 -33, 36, 39, 42, 45, 48, 51, 54, 57, so it ends on the 60.

Count the amount of multiples of 3 (10) and the multiples of 10 (3) where they intersect.

The pattern continues if you go to 90.
It should sort of look like a crossword puzzle.

Does that make any sense?

What will be really funny is if there is something obvious that we are missing!! Good luck.

 Bertie Joined: May 2007 Posts: 1,797 Senior Member
Bertie

Joined: May 2007
Posts: 1,797
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patterns
09-19-2007, 01:15 PM
 #4

I'd keep it much simpler, and try to lead her into discovering herself by asking her leading questions as she looks at the chart she's colored.......

-count by 10; I see all numbers are at the end of the row, all numbers end in zero, the first number (the tens) increases, in order, by ones each time, there is a straight line down for tens, label would be
aaaaaaaaab

-count by 3; I see diagonal lines across the page slanting to the left side, once I started seeing the pattern I could predict for the rest of the chart, there are 2 spaces between each number both sideways and up/down, pattern label would be aab

Does that help?

 mmw Joined: Sep 2005 Posts: 472 Senior Member
mmw

Joined: Sep 2005
Posts: 472
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09-19-2007, 03:42 PM
 #5

I think the pattern for counting by 3's is a repeating pattern: 3,6,9, 2,5,8,1,4,7,0 in the ones place.

Counting by 10's the pattern is zeros in the ones place.

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