Counting
Free lessons and practice worksheets for counting — worked examples, common mistakes, and step-by-step solutions.
- 01Counting3 min read
Compare & Order Numbers
Comparing and ordering numbers involves determining which numbers are greater than, less than, or equal to each other using the symbols <, >, and =. This fundamental skill builds on counting and place value understanding, appearing in standards CCSS.1.NBT.3 and CCSS.2.NBT.4. The process requires examining digits systematically, starting from the leftmost position to determine relative size.
- 02Counting3 min read
Even & Odd Numbers
Even numbers are integers that end in 0, 2, 4, 6, or 8 and divide exactly by 2 without remainder. Odd numbers end in 1, 3, 5, 7, or 9 and always leave a remainder of 1 when divided by 2. The classification appears in CCSS.2.OA.3, where second graders learn to identify these patterns and write equations showing even numbers as sums of equal addends.
- 03Counting3 min read
Represent Numbers
Number representation refers to the various ways of expressing the same numerical value using different formats and visual models. A single number like 47 can be written as digits (47), words (forty-seven), expanded form (40 + 7), or depicted with base-10 blocks showing 4 tens rods and 7 ones cubes. This flexibility in representation helps build deeper understanding of number structure and place value concepts outlined in CCSS.1.NBT.2 and CCSS.2.NBT.1.
- 04Counting3 min read
Skip Counting
Skip counting means counting by intervals larger than 1, such as counting by 2s (2, 4, 6, 8) or by 5s (5, 10, 15, 20). This fundamental counting technique builds number sense and reveals patterns in the number system. Skip counting serves as a foundation for multiplication facts, time concepts, and money calculations.