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Diagonal Dilemmas<br />
2 More diagonals.<br />
3 Make your own tables.<br />
1 Complete this multiplication table.<br />
a Shade the numbers in the third and<br />
fourth rows.<br />
b Can you see the lines joining numbers in<br />
each row along a diagonal? Find the<br />
differences between the two numbers on<br />
each of the diagonals.<br />
, , , , , , ,<br />
c What do you notice?<br />
a Shade the numbers in the seventh and eighth rows. Mark the diagonals.<br />
b Find the differences between each pair of numbers on the diagonals.<br />
c What do you notice?<br />
a Use an empty table on page 11. Choose two more rows that are next <strong>to</strong> each other<br />
and mark in the diagonals. Write the differences between each pair of numbers<br />
along the diagonals.<br />
b What do you notice?<br />
Challenge!<br />
3 6 9 12 15 18<br />
4 8 12<br />
21<br />
16 20 24 28<br />
2 1<br />
Viewing sample<br />
Use an empty table on page 11<br />
and write down what happens when<br />
you change the direction of the diagonals.<br />
10 • <strong>Number</strong> patterns <strong>to</strong> <strong>Algebra</strong> • © R.I.C. Publications ® • www.ricpublications.com.au •
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