Skip-counting

Learning Objectives Skip-count forward by 2s, 3s, 4s, 5s, 10s, and 100s from any given number. Skip-count backward by 2s, 5s, and 10s from any given number. Identify the rule (the interval) in a given skip-counting pattern. Find and fill in missing numbers in a skip-counting sequence. Use a number line to model skip-counting. Connect skip-counting to repeated addition and the foundation of multiplication. Solve simple word problems using skip-counting. How could you count all the fingers in your classroom without counting every single one? 🖐️ Skip-counting is the super-fast math superpower that lets you do it! In this lesson, we will learn how to skip-count by different numbers, both forwards and backwards. This skill is a shortcut for counting large groups of things and...

TermDefinitionExample Skip-CountingCounting numbers by adding or subtracting the same number each time, instead of counting by ones.Counting by 5s: 5, 10, 15, 20, 25... IntervalThe number you add or subtract each time when you skip-count. It's the size of the 'skip'.In the pattern 10, 20, 30, 40, the interval is 10. PatternA set of numbers that follows a specific rule. Skip-counting creates a number pattern.The pattern 3, 6, 9, 12 follows the rule 'add 3'. SequenceAn ordered list of numbers that follows a pattern.The sequence 45, 40, 35, 30 is a backward skip-counting sequence. Forward Skip-CountingCounting up by adding the interval each time. The numbers get bigger.Starting at 8 and counting forward by 2s: 8, 10, 12, 14... Backward Skip-CountingCounting down by s...

Forward Skip-Counting Rule Next Number = Current Number + Interval To find the next number when counting up, add the interval to the number you are currently on. Backward Skip-Counting Rule Next Number = Current Number - Interval To find the next number when counting down, subtract the interval from the number you are currently on. Finding the Interval Rule Interval = Second Number - First Number To figure out the rule of a sequence, subtract the first number from the second number. This tells you what number is being added each time.