Video Transcript
Number Patterns
In this video, we will learn how to
find the missing numbers in number patterns. A number pattern is a series of
numbers which we read from left to right. Before we can find missing numbers
in patterns, first we have to find out what the rule is, in other words, what is
happening to the numbers each time. 10, 20, 30, 40, 50, 60, 70, 80, 90,
100. These numbers are increasing by 10
each time. The rule of the pattern is to add
10. Let’s see if we can find the rule
for the second pattern. 50, 45, 40, 35, 30, 25, 20, 15. The numbers are decreasing by five
each time.
So the rule for this pattern is
just subtract five or takeaway five each time. Once we found the rule, we can
complete the pattern. The next number in this sequence
would be 110 — 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110. And the next number in this
sequence would be 10 because 10 is five less than 15. The rule of this pattern is to
subtract five each time. Let’s practice some example
questions. Remember, first we find the
rule. Then we can complete the
pattern.
What are the missing numbers in
this sequence, 10, 20, a missing number, 40, 50, missing number, missing number. Before we can find the missing
numbers, first, we need to find the rule for the pattern. What happens to the numbers each
time? 10, 20, the missing number, 40,
50. And we don’t know the last two
numbers in the sequence. The numbers are increasing by 10
each time. We’re counting in 10s. So the rule is to add 10. Now that we found the rule, we can
complete the pattern and fill in the missing numbers. 20 add 10 is 30. 50 add 10 is 60. 60 add 10 is 70. 10, 20, 30, 40, 50, 60, 70. The missing numbers in the pattern
are 30, 60, and 70.
Complete the following pattern. Five, 15, missing number, missing
number, another missing number, 55. First, we need to find the
rule. What’s happening to the numbers
each time? How do we get from five to 15? Five plus 10 is 15. So the rule is two add 10 each
time. 15 add 10 is 25. 25 add 10 is 35. and 35 add 10 is
45. First, we found the rule. Then we completed the pattern. Five, 15, 25, 35, 45, 55. The missing numbers are 25, 35, and
45.
Complete the following pattern. Eight, six, the missing number,
another missing number. Remember, we need to find the rule
first and then complete the pattern. How do we get from eight to
six? Eight take away two is six. So the rule is to subtract two each
time. Six take away two is four. And four take away two is two. Eight, six, four, two. The missing numbers in the pattern
are four and two. In this video, we’ve learnt how to
complete the missing numbers in number patterns. First, we find the rule. And then we can complete the
pattern.
