Shrinking number patterns
The same number is taken away every time.
See worked examples
150, 142, 134, 126, … Write the next three numbers and the rule.
Answer: Next three: 118, 110, 102; Rule: Start at 150; subtract 8 each time
168, 163, 158, 153, … Write the next three numbers and the rule.
Answer: Next three: 148, 143, 138; Rule: Start at 168; subtract 5 each time
128, 118, 108, 98, … Write the next three numbers and the rule.
Answer: Next three: 88, 78, 68; Rule: Start at 128; subtract 10 each time
Tip: The same number is taken away every time.
Curriculum
Common Core: 3.OA.D.9, 4.OA.C.5
On paper: this skill is in the printable pack Grade 3 Common Core Math: Patterns and Algebraic Thinking, with an answer key.
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