Useful Squares

12² = 144 = one gross which is a dozen dozens

• 13² = 169
• 14² = 196
• 15² = 225
• 16² = 256
• 20² = 400
• 25² = 625
• 30² = 900
• 40² = 1,600
• 50² = 2,500

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  Browse Math Tutoring Tips:

• Introduction
• Wholes and Parts
• Zero - 0
• One - 1
• Fractions
• Common Fractions and Equivalences
• Useful Squares
• Factors of 100
• Useful Multiples of 15 and 16
• Percents
• Primes
• Geometry
• Language of Math
• Other Useful Information
• Number systems
• A Different Way to Think about Percent
• Conclusion

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Math Tips for Parents