PR-6102UK Investigating Number Patterns 3
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Function Machines – 1<br />
When numbers pass through a function machine, they change according to the way<br />
the machine has been programmed. For example, the function machine below has been<br />
programmed to add five (+5). Note what happens when numbers pass through the machine.<br />
1 Insert the missing numbers for each function machine<br />
and explain what the machine is doing.<br />
a 5, 6, 7, 8, 9, + 10<br />
b 100, 101, 102, 103, + 1<br />
c 10, 11, 12, 13, 14 - 1<br />
d 20, 30, 40, 50, 60 ÷ 2<br />
e 20, 30, 40, 50, 60 ÷ 10<br />
f 3, 6, 9, 12, 15 x 4<br />
g - 5 10, 11, 12, 13, 14<br />
h x 2 10, 12, 14, 16, 18<br />
2 Explain how you worked out the answers to questions (g) and (h).<br />
3 Try this function machine.<br />
The + 5 machine<br />
adds five.<br />
15, 16, adds 10<br />
Viewing sample<br />
+ 8 14, 15, 16, 17, 18<br />
Challenge<br />
Write a ‘function machine’ question and give it to a friend to answer.<br />
(Remember to write the answers on a separate sheet of paper.)<br />
• www.ricpublications.com.au• © R.I.C. Publications ® • <strong>Investigating</strong> <strong>Number</strong> patterns • 19
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