Unit 1 Secret Numbers Pattern Worksheet Page 28
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34100 99 98 97 96 95 94 93 92 91
The numbers in the
90 89 88 87 86 85 84 83 82 81
coloured squares
80 79 78 77 76 75 74 73 72 71
form patterns.
70 69 68 67 66 65 64 63 62 61
60 59 58 57 56 55 54 53 52 51
50 49 48 47 46 45 44 43 42 41
40 39 38 37 36 35 34 33 32 31
30 29 28 27 26 25 24 23 22 21
20 19 18 17 16 15 14 13 12 11
10 9
8
7
6
5
4
3
2
1
The pattern rule for the orange squares is:
• Start at 100. Count back by 5s each time.
100
95
90
85
80
75
70 …
–5
–5
–5
–5
–5
–5
The ones digit follows this pattern: 0, 5, 0, 5, 0, 5, . . .
The tens digit follows this pattern: 9, 9, 8, 8, 7, 7, . . .
The pattern rule for the green squares is:
• Start at 100. Count back by 2s each time.
100
98
96
94
92
90
88 …
–2
–2
–2
–2
–2
–2
The ones digit follows this pattern: 8, 6, 4, 2, 0, 8, 6, 4, 2, 0, . . .
The tens digit follows this pattern: 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, . . .
Both patterns form vertical lines.
Some numbers appear in both patterns.
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Unit 1 Lesson 8
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