Number Patterns
Rules for Patterns
Rounding
Addition
Subtraction
100
5, 10, 15, ____
20
100
25, 30, 35, 40
Adding by 5
100
Round 59 to the nearest 10
60
100
15+24
39
100
59-26
33
200
12, 15, 18, _____
21
200
27, 30, 33, 36
Adding by 3
200
Round 283 to the nearest hundred
300
200
93+28
121
200
64-29
35
300
22, 20, 18, _____
16
300
28, 26, 24, 22, 20
Subtracting by 2
300
Round 653 to the nearest hundred
700
300

77 + 83

160

300

98-23

75

400
50, 45, 40, ______
35
400
56, 60, 64, 68
Adding by 4
400

Round 638 to the nearest hundred.

600

400

64+78

142

400

812-46

766

500
97, 94, 91, 88, ____
85
500
42, 39, 36, 33
Subtracting by 3
500

Round 583 to the nearest hundred.

600

500

679+564

1,243

500
900-364
536
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