I can't believe I'm actually answering this question.
Try using match sticks.
Tear out all the matches from a book of matches.
Lay them on the table.
Count them in three rows of seven.
add the three rows together and you should come up with....
Twenty one.
2006-09-10 11:38:41
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answer #1
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answered by LilShariwa 2
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21
2006-09-10 12:04:09
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answer #2
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answered by Anonymous
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21
2006-09-10 11:24:12
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answer #3
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answered by ? 3
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21
2006-09-10 11:19:37
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answer #4
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answered by penpallermel 6
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3x7=21
this is how it works...
3x1=3
3x2=6
3x3=9
3x4=12
3x5=15
3x6=18
3x7=21
and so on...
multiplication is just the number of times you add a number.
ex.) 3x10=30
3+3+3+3+3+3+3+3+3+3=30 (this is ten threes being added together)
i hope this helps. good luck!!
2006-09-10 11:24:41
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answer #5
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answered by VEN 2
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You can spend the time to write this question out and wait for an answer but not use a simple calculator? 21
2006-09-10 11:22:56
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answer #6
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answered by firemandan900 6
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21.
add 7 together 3 times: 7+7+7=
or add 3 together 7 times: 3+3+3+3+3+3+3=
2006-09-10 11:20:57
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answer #7
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answered by linzy383 2
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71
2006-09-10 11:22:43
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answer #8
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answered by Mudkiporz 3
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My age....21
2006-09-10 11:24:44
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answer #9
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answered by Anonymous
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ummmmmmmmmmmm 21
2006-09-10 11:24:33
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answer #10
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answered by D@rl3n3 1
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