## Tuesday, May 1, 2012

### Speed! - Patterns in the Cards - Seven Speed

This is the sixth post in the series of posts. - Speed! Patterns in the Cards - I created the fun card game Speed! to teach multiplication. It uses skip counting to teach children to multiply and how to multiply faster. The series of Patterns in the Cards blog posts are meant to show some simple activities that can aid in number sense development using the Speed! cards.

Seven Speed
Lay your cards out like this. What patterns do you see?

Here are the patterns I found with my son.
1. You can count from 1-10 with the ones digit. Start at the top-right card and look down the column. Proceed to the center column and lastly to the left-hand column. Let me write it differently so it's easier to read.

7 - 4 - 1
8 - 5 - 2
9 - 6 - 3
0

2. Tens digit is 0-1-2 in the first row, 2-3-4 in the second row, 4-5-6 in the third row, and a 7 in the fourth row. Let me write it differently so it's easier to read.

0 - 1 - 2
2 - 3 - 4
4 - 5 - 6
7

Do you think these patterns would continue if we added more cards? Continue laying out Seven Speed cards with the backs up while counting by sevens in your head or writing the numbers on small slips of paper.

77  -  84  -   91
98  - 105 - 112
119 - 126 - 133
140
147 - 154 - 161
168 - 175 - 182
189 - 196 - 203
210

The patterns do continue!
Did you find any more patterns? Can you lay your cards out differently and find more patterns?

Do you remember the patterns in Three Speed? They also contained each number in the ones digit column unlike even number cards which only contained the digits 2, 4, 6, 8 and 0 in the ones digit and Five Speed which only contained 0 and 5. We only have Eight Speed and Nine Speed left. Do you think either one will contain each of the digits in the ones column?

When you are done with this activity get out Eight Speed and get ready for next week.