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number theory
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numeration
operations with numbers
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Number Theory

These problems delve into some basic properties of numbers, including odds/evens and factors/multiples.
 Related Resources

Interactive resources from our Math Tools project:
Math 1: Number Sense
NCTM Standards:
Number and Operations Standard for Grades PreK3
Access to these problems requires a Membership.

Counting Shells


Grade 2. Use the clues to figure out how many shells Jack has.
... more>>

Donuts on a Tray


Grade 2. Help Glenda to figure out how to arrange snacks on a tray in equal
rows.
... more>>

Laying Carpet


Grade 2. Figure out the different sizes that LeBron's rectangular room might
be.
... more>>

Making Sandwiches


Grade 1. Help Ricardo and Gloria divide their task as fairly as possible.
... more>>
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