PR-6102UK Investigating Number Patterns 3

The 99 Times Table
1 2 3 4 5 6 7 8
AC C % ÷
7 8 9 x
4 5 6 –
1 2 3 =
0 . +
2 You have discovered patterns in the table of 9.
You can also see patterns in the table of 99.
a What do you notice about the units, tens and hundreds?
1 Complete the 99
times table.
b What happens when you add the digits in the answer?
1 x 99 = 99
2 x 99 =
3 x 99 =
4 x 99 =
5 x 99 =
6 x 99 =
7 x 99 =
8 x 99 =
9 x 99 =
10 x 99 =
11 x 99 =
12 x 99 =
13 x 99 =
14 x 99 =
15 x 99 =
16 x 99 =
17 x 99 =
18 x 99 =
19 x 99 =
20 x 99 =
21 x 99 =
198
297
3 Try to write a rule to determine whether a number
is divisible by nine without leaving a remainder. Share
and discuss your ideas with a friend.
Viewing sample
16 • Investigating Number patterns • © R.I.C. Publications ® • www.ricpublications.com.au •