Numerical order for whole numbers from 0 through 20 establishes that each number has a fixed position in a sequence: numbers increase by one from left to right, with a successor and predecessor except at the endpoints. This understanding supports comparing quantities and numerals, arranging numbers in ascending or descending order, and interpreting their positions on a number line; ordering larger numbers or using more general place-value rules is beyond this scope.
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- Learn “Order numbers to 20” with a detailed explanation of the concept
- Master “Order numbers to 20” with unlimited, free practice problems
- Download (or modify) a free worksheet on Order numbers to 20 you can use at home or in class with practice problems that scaffold and explore “Order numbers to 20” from different perspectives.
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Detailed Explanation: Order numbers to 20
To put numbers in numerical order, arrange them from smallest to largest. On a number line, numbers get larger as you move to the right.
Example: Put , , and in order from smallest to largest.
-
Find the smallest number.
comes before and , so it is the smallest. -
Find the next number.
comes after but before . -
Place the largest number last.
is the largest.
So, the numbers in order are:
Remember: Count forward to find which number comes next. The number farther to the right on a number line is greater.
Learn by doing: Order numbers to 20
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Practice:
Number Sense - Ordering 2 Integers (ascending)
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Download/Modify Free Grade 1 'Order numbers to 20' Worksheet
Print this free 'Order numbers to 20' worksheet to practice this skill away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- Number Sense - Ordering 2 Integers (ascending)
- Number Sense - Ordering 2 Integers (descending)
- Number Sense - Ordering 3 Integers (both)
- Number Sense - Ordering 4 Integers (ascending)
- Number Sense - Ordering 4 Integers (descending)
- Count Backwards by 1s - Within 20
- Number Line - Positive Integers, Select Dot - From Ticks
- Number Line - Positive Integers, Read Number - From Ticks
Units Teaching This Skill
These adaptive units introduce, teach, or reinforce this skill (Order numbers to 20) through scaffolded problems that grow in difficulty as concepts are understood.