Even and odd
Identify even and odd numbers
Write even or odd beside twenty different numbers. Choose a 0–20 starter range or practice larger values up to 200.
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Even and odd tables: small numbers
Work through sixty distinct values in three grids: color only odd numbers, only even numbers, then both groups. Choose ranges from 0–75 to 100–200.
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In the first grid, color only odd numbers amber. In the second, color only even numbers blue. In the last grid, color both groups using their matching colors.
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Choose a useful starting range
There are three grids and sixty distinct values: sixteen odd-only decisions, sixteen even-only decisions and twenty-eight decisions covering both parities. In the first two grids, correctly leaving a cell neutral matters just as much as coloring a requested cell.
Learning objective
What this activity builds
Apply an even-or-odd rule consistently while following a different selection instruction for each grid.
Worked example
An odd-only grid contains 24 and 35. What should you color?
Color 35 amber and leave 24 uncolored.
35 is odd because its ones digit is 5. Although 24 is even, this particular grid asks for odd numbers only.
Teaching notes
Make the practice count
- Read the instruction above each grid before starting. Leaving a cell neutral is the correct choice when that grid does not request its parity.
- The first two grids each have sixteen cells; the final grid has twenty-eight. Work on one grid at a time if sixty decisions are too much for one sitting.
- Every value on a worksheet is different, and each grid contains both even and odd numbers. Do not expect the shuffled cells to alternate.
- Use the words even and odd during checking. The answer key labels the selected cells as well as coloring them, and keeps unselected cells neutral.
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Related activities
Even and odd
Even and odd tables: large numbers
Classify sixty different larger values in odd-only, even-only and mixed grids. Select 0–500, 500–1000, 1000–1500 or 1500–2000.
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Even and odd
Color even and odd numbers
Sort sixteen numbered circles by coloring even numbers blue and odd numbers amber. Choose a small starting range or extend the numbers to 100.
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