Quick Reference ~ A maths Dictionary for Kids by Jenny Eather Email jeather@iprimus.com.au A Maths Dictionary for Kids by Jenny Eather at www.amathsdictionaryforkids.com

Aa Bb Cc Dd Ee Ff Gg Hh Ii Jj Kk Ll Mm
Nn Oo Pp Qq Rr Ss Tt Uu Vv Ww Xx Yy Zz


Dd

digit sum, digital root

• digit sum ... the sum of all the digits in a number.
• digital root ... obtained by repeating the digit sum
until a single digit is reached.

EXAMPLES:
digit sum, digital root

digital root calculator
http://www.thonky.com/digital-root-calculator/

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