Odd or Even in a Monstrous Season

Odd or Even in a Monstrous Season

Elsie the Even and Onslow the Odd are monsters who are constantly sorting numbers. These monsters help young readers learn how to determine if a number is even or odd: if a number ends with zero, two, four, six, or eight, it’s even; if a number ends in one, three, five, seven, or nine, it’s odd...

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