Counting objects in structured arrangements helps us find patterns and count quickly.
Arranging play money in symmetrical patterns helps in counting and understanding place value.
Using play money of denominations $1$, $2$, $5$, and $10$ to represent different amounts such as:
Shirley and Shiv arrange their coins in different grouping patterns:
Numbers can be classified based on whether they can be fully paired.
Classifying numbers between $1$ and $20$:
Using visual aids like a numbered crayon box to identify patterns in numbers up to $50$.
Understanding rules and patterns for larger numbers.
Classifying numbers like $30$, $46$, $78$, $154$, $300$ as even, and $67$, $99$, $415$ as odd based on their ending digit.
Using digits $1$ and $6$ without repetition:
When writing consecutive numbers (e.g., $20, 21, 22, 23, \dots$):