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Find missing terms, describe constant changes and connect growing object patterns with numbers.
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Practise the method.
Find missing terms, describe constant changes and connect growing object patterns with numbers.
Find missing terms, describe constant changes and connect growing object patterns with numbers.
Example 1
Which rule makes this pattern? 16,14,12,10
Show worked answer
Answer: Subtract 2 each time
- Compare two neighbours: 14 is less than 16 by 2.
- The same change repeats, so the rule is: subtract 2 each time.
Example 2
Find the missing number: 9,11,13,15, ?.
Show worked answer
Answer: 17
- The same change is used each time: add 2.
- 15+2=17.
Example 3
Find the missing number: 63, ?, 59,57,55.
Show worked answer
Answer: 61
- The same change is used each time: subtract 2.
- 63−2=61.
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