Grade 3 math · D.1 · Skip-Counting Patterns
Count up by 50s
Look at the tens digit. It flips between two digits.
See worked examples
278, 328, 378, 428, … Write the next three numbers and the rule.
Answer: Next three: 478, 528, 578; Rule: Start at 278; add 50 each time
321, 371, 421, 471, … Write the next three numbers and the rule.
Answer: Next three: 521, 571, 621; Rule: Start at 321; add 50 each time
631, 681, 731, 781, … Write the next three numbers and the rule.
Answer: Next three: 831, 881, 931; Rule: Start at 631; add 50 each time
Tip: Look at the tens digit. It flips between two digits.
Curriculum
Common Core: 2.NBT.A.2
On paper: this skill is in the printable pack Grade 3 Common Core Math: Number and Operations, with an answer key.
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