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Combining Columns<br />
1. Add a number in the second column to a<br />
number in the third column. In which<br />
column does the answer appear?<br />
2. Try adding some more numbers in the<br />
second column to numbers in the third<br />
column. What do you notice?<br />
3. Try adding numbers in the second and<br />
fifth columns. In which column does the<br />
answer appear?<br />
1 2 3 4 5 6 7 8 9 10<br />
11 12 13 14 15 16 17 18 19 20<br />
21 22 23 24 25 26 27 28 29 30<br />
31 32 33 34 35 36 37 38 39 40<br />
41 42 43 44 45 46 47 48 49 50<br />
51 52 53 54 55 56 57 58 59 60<br />
61 62 63 64 65 66 67 68 69 70<br />
71 72 73 74 75 76 77 78 79 80<br />
81 82 83 84 85 86 87 88 89 90<br />
91 92 93 94 95 96 97 98 99 100<br />
4. Now try adding numbers in the second and seventh columns.<br />
In which column does the answer appear?<br />
5. Try adding numbers in the third column to numbers in other columns.<br />
Write any patterns that you notice about where the answer appears.<br />
6. Experiment with numbers from different columns and write down what you notice about<br />
the column in which the answer appears.<br />
7. Where does the answer appear when a number in a particular column is doubled?<br />
Experiment to find out whether any patterns exist.<br />
8. What do you think would happen if a number in a particular<br />
column is trebled, quadrupled? In which column would you<br />
expect to find the answer?<br />
R.I.C. Publications www.ricgroup.com.au<br />
54<br />
<strong>Number</strong> <strong>Grids</strong><br />
ISBN 978-1-86311-826-2
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