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E-mail:
tim@mathriddlebook.com
Thank you for downloading the PREVIEW
version of the Secret Code Math Worksheets.
If you like what you see, I hope you'll consider downloading the full,
printable version from www.mathriddlebook.com.
Copyright 2009 - Tim Wei
Secret Code Math - www.mathriddlebook.com
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Welcome to the Secret Code Math Book
Kids need to master basic operations, including addition, subtraction,
multiplication, and division. The only way to do this is through consistent,
repetitive practice. Unfortunately, most drill-and-practice worksheets are dull and
tedious for students to complete.
In an effort to make math practice more fun, I have developed two printable
eBooks filled with math worksheets that seem more like puzzles and less like
math work.
The first book, Math Riddle Book , was released in 2007 and has been a huge hit
with students, parents, and teachers. It features corny, laugh-out-loud riddles
that kids love! Kids can unlock the answers to the riddles by solving a set of Math
problems.
The second book, Secret Code Math, is the one you're reading right now. The
worksheets in this book feature a symbol key that kids must use to decode the
numbers in a math problem before they can find the answers. In addition to
teaching math skills, Secret Code Math helps kids build concentration and logical
reasoning.
I hope your students enjoy learning from the worksheets in this book.
Sincerely,
Tim Wei
P.S. Please, if you have any questions, comments, or suggestions, please feel free
to e-mail me. My address is: tim@mathriddlebook.com
Secret Code Math - www.mathriddlebook.com
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Secret Code Math
Table of Contents
Addition
3-Digit Addends ............................................................................... 5
Addition
4-Digit Addends ............................................................................... 7
Addition
Column Addition: 3-Addends, 3-Digits ................................................ 9
Addition
Column Addition, 3-Addends, 4-Digits ................................................. 11
Subtraction
No Borrowing, 2-Digit Numbers .......................................................... 13
Subtraction
Borrowing (Regrouping), 2-Digit Numbers .......................................... 15
Subtraction
Borrowing (Regrouping), 3-Digit numbers .......................................... 17
Subtraction
Borrowing (Regrouping) Across Zero, 3-Digit Numbers ........................ 19
Subtraction
Subtraction (Regrouping) Across Zero, 4-Digit Numbers ........................ 21
Multiplication
Basic Facts 0 - 9 ............................................................................. 23
Multiplication
Basic Facts 0 - 12 ............................................................................. 25
Multiplication
Hundreds Patterns .......................................................................... 27
Secret Code Math - www.mathriddlebook.com
Secret Code Math
Table of Contents
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Secret Code Math
Table of Contents
Multiplication
2-Digits by 1-Digit .......................................................................... 29
Multiplication
3-Digits by 1-Digit .......................................................................... 31
Multiplication
2-Digits by 2-Digits ......................................................................... 33
Multiplication
3-Digits by 2-Digits ......................................................................... 35
Division
Basic Facts ..................................................................................... 37
Division
1-Digit Quotients with Remainders .................................................... 39
Division
2-Digit Quotients without Remainders ................................................ 41
Division
2-Digit Quotients with Remainders ................................................... 43
Rounding
Rounding to the Nearest Ten ............................................................ 45
Rounding
Rounding to the Nearest Hundred ..................................................... 47
Comparing
Compare Numbers Using, <, >, and = .............................................. 49
Secret Code Math - www.mathriddlebook.com
Table of Contents
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Name: ___________________________
Secret Code Math
Addition with 3-Digit Addends
Decode the addends and find the sums.
1 2 3 4 5 6 7 8 9 0
 
Code Numbers
Regular Numbers
Code Numbers
Regular Numbers
1 4 6 
+  + 1 7 3
+ 
Code Numbers
Regular Numbers
Code Numbers
Regular Numbers
 
+  + 
Code Numbers
Regular Numbers
Code Numbers
Regular Numbers
 
+  + 
Secret Code Math - www.mathriddlebook.com
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