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All number sense worksheets available on this page are free. The number sense worksheets contained on this page can be used as assessment tools, extra practice for students learning their basic number facts, and any other purpose that you see fit. Each worksheet comes complete with an answer key which can be used for self-correcting or marking. The "+-" value in brackets refers to how close the sets of two numbers are together. For instance, +-9 means that the first number is up to 9 larger or 9 smaller than the second number. The regular comparing worksheets contain randomly-generated pairs of numbers. I included commas to separate the periods (groups of three) in large numbers. If anyone would like periods separated by spaces (as is used in SI notation), please let me know.

Hundred Charts

Hundred Chart  | Left-Handed Hundred Chart  | Blank Hundred Chart  | Four Hundred Charts  | Four Left-Handed Hundred Charts  | Four Blank Hundred Charts

Ninety-Nine Charts

Ninety-Nine Chart  | Left-Handed Ninety-Nine Chart  | Four Ninety-Nine Charts  | Four Left-Handed Ninety-Nine Charts

Other Hundred Charts

Random Missing   | Multiples of Five Included   | Random Missing   | Even Numbers Missing   | Only 10 Numbers Included   | Multiples of Three Missing 

Place Value Charts

Place Value Chart to 100 million  | Decimal Place Value Chart

Number Lines

Blank Number Lines  | Number Line to 100 by 1's  | Number Lines to 20 by 1's  | Number Lines to 40 by 2's  | Number Line to 200 by 2's  | Number Lines to 50 by 10's  | Number Line to 125 by 1's  | Number Line to 125 by 2's  | Number Line to 125 by 3's  | Number Line to 125 by 4's  | Number Line to 125 by 5's  | Number Line to 125 by 6's  | Number Line to 125 by 7's  | Number Line to 125 by 8's  | Number Line to 125 by 9's  | Number Line to 125 by 10's

Place Value

Place Values (ones to hundreds) A B C D E F G H I J All
Place Values (ones to thousands; US format) A B C D E F G H I J All
Place Values (ones to ten thousands; US format) A B C D E F G H I J All
Place Values (ones to hundred thousands; US format) A B C D E F G H I J All
Place Values (ones to millions; US format) A B C D E F G H I J All
Place Values (ones to ten millions; US format) A B C D E F G H I J All
Place Values (ones to hundred millions; US format) A B C D E F G H I J All
   
Place Values (ones to thousands; SI format) A B C D E F G H I J All
Place Values (ones to ten thousands; SI format) A B C D E F G H I J All
Place Values (ones to hundred thousands; SI format) A B C D E F G H I J All
Place Values (ones to millions; SI format) A B C D E F G H I J All
Place Values (ones to ten millions; SI format) A B C D E F G H I J All
Place Values (ones to hundred millions; SI format) A B C D E F G H I J All
   
Place Values (ones to thousands; European format) A B C D E F G H I J All
Place Values (ones to ten thousands; European format) A B C D E F G H I J All
Place Values (ones to hundred thousands; European format) A B C D E F G H I J All
Place Values (ones to millions; European format) A B C D E F G H I J All
Place Values (ones to ten millions; European format) A B C D E F G H I J All
Place Values (ones to hundred millions; European format) A B C D E F G H I J All

Comparing Numbers

Old Comparing Worksheets 50 to 1,000 (right-click and save; it is a large file)

Old Comparing Worksheets 10,000 and up (right-click and save; it is a large file)

Revised! Comparing Numbers to 9 A B C D E F G H I J All LP
Revised! Comparing Numbers to 25 A B C D E F G H I J All LP
Revised! Comparing Numbers to 50 A B C D E F G H I J All LP
Revised! Comparing Numbers to 50 (tight) A B C D E F G H I J All LP
Revised! Comparing Numbers to 100 A B C D E F G H I J All LP
Revised! Comparing Numbers to 100 (tight) A B C D E F G H I J All LP
Revised! Comparing Numbers to 1000 A B C D E F G H I J All LP
Revised! Comparing Numbers to 1000 (tight) A B C D E F G H I J All LP
  
Revised! Comparing Numbers to 10,000 (U.S. Version) A B C D E F G H I J All LP
Revised! Comparing Numbers to 10,000 (tight) (U.S. Version) A B C D E F G H I J All LP
Revised! Comparing Numbers to 100,000 (U.S. Version) A B C D E F G H I J All LP
Revised! Comparing Numbers to 100,000 (tight) (U.S. Version) A B C D E F G H I J All LP
Revised! Comparing Numbers to 1,000,000 (U.S. Version) A B C D E F G H I J All LP
Revised! Comparing Numbers to 1,000,000 (tight) (U.S. Version) A B C D E F G H I J All LP
Revised! Comparing Numbers to 10,000,000 (U.S. Version) A B C D E F G H I J All LP
New! Comparing Numbers to 10,000,000 (tight) (U.S. Version) A B C D E F G H I J All LP
  
New! Comparing Numbers to 10 000 (S.I. Version) A B C D E F G H I J All LP
New! Comparing Numbers to 10 000 (tight) (S.I. Version) A B C D E F G H I J All LP
New! Comparing Numbers to 100 000 (S.I. Version) A B C D E F G H I J All LP
New! Comparing Numbers to 100 000 (tight) (S.I. Version) A B C D E F G H I J All LP
New! Comparing Numbers to 1 000 000 (S.I. Version) A B C D E F G H I J All LP
New! Comparing Numbers to 1 000 000 (tight) (S.I. Version) A B C D E F G H I J All LP
New! Comparing Numbers to 10 000 000 (S.I. Version) A B C D E F G H I J All LP
New! Comparing Numbers to 10 000 000 (tight) (S.I. Version) A B C D E F G H I J All LP
  
New! Comparing Numbers to 10.000 (Euro Version) A B C D E F G H I J All LP
New! Comparing Numbers to 10.000 (tight) (Euro Version) A B C D E F G H I J All LP
New! Comparing Numbers to 100.000 (Euro Version) A B C D E F G H I J All LP
New! Comparing Numbers to 100.000 (tight) (Euro Version) A B C D E F G H I J All LP
New! Comparing Numbers to 1.000.000 (Euro Version) A B C D E F G H I J All LP
New! Comparing Numbers to 1.000.000 (tight) (Euro Version) A B C D E F G H I J All LP
New! Comparing Numbers to 10.000.000 (Euro Version) A B C D E F G H I J All LP
New! Comparing Numbers to 10.000.000 (tight) (Euro Version) A B C D E F G H I J All LP

Rounding Numbers

Revised! Rounding to Ten (U.S. Version) A B C D E F G H I J All
Revised! Rounding to a Hundred (U.S. Version) A B C D E F G H I J All
Revised! Rounding to a Thousand (U.S. Version) A B C D E F G H I J All
New! Rounding to Ten Thousand (U.S. Version) A B C D E F G H I J All
New! Rounding to a Hundred Thousand (U.S. Version) A B C D E F G H I J All
New! Rounding to a Million (U.S. Version) A B C D E F G H I J All
  
New! Rounding to Ten (SI Version) A B C D E F G H I J All
New! Rounding to a Hundred (SI Version) A B C D E F G H I J All
New! Rounding to a Thousand (SI Version) A B C D E F G H I J All
New! Rounding to Ten Thousand (SI Version) A B C D E F G H I J All
New! Rounding to a Hundred Thousand (SI Version) A B C D E F G H I J All
New! Rounding to a Million (SI Version) A B C D E F G H I J All
   
New! Rounding to Ten (Euro Version) A B C D E F G H I J All
New! Rounding to a Hundred (Euro Version) A B C D E F G H I J All
New! Rounding to a Thousand (Euro Version) A B C D E F G H I J All
New! Rounding to Ten Thousand (Euro Version) A B C D E F G H I J All
New! Rounding to a Hundred Thousand (Euro Version) A B C D E F G H I J All
New! Rounding to a Million (Euro Version) A B C D E F G H I J All

Ordering Numbers a.k.a. Sorting Numbers

Ordering Numbers from 0 to 9 A B C D E F G H I J All
Ordering Numbers from 1 to 20 A B C D E F G H I J All
Ordering Numbers from 10 to 50 A B C D E F G H I J All
Ordering Numbers from 10 to 99 A B C D E F G H I J All
Ordering Numbers from 100 to 999 A B C D E F G H I J All

Factors and Factoring

New! All Factors of a Number (range 4 to 50) A B C D E F G H I J All
New! All Factors of a Number (range 50 to 100) A B C D E F G H I J All
New! All Factors of a Number (range 100 to 200) A B C D E F G H I J All
New! All Factors of a Number (range 200 to 400) A B C D E F G H I J All
Prime Factors Using a Tree Diagram (range 4 to 48) A B C D E F G H I J All
Prime Factors Using a Tree Diagram (range 4 to 96) A B C D E F G H I J All
Prime Factors Using a Tree Diagram (range 4 to 144) A B C D E F G H I J All
Prime Factors Using a Tree Diagram (range 48 to 192) A B C D E F G H I J All
Factors Using a Tree Diagram (range 48 to 240) A B C D E F G H I J All

Expanded Form

Revised! Write Numbers in Expanded Form (range 100 to 999) A B C D E F G H I J All
  
Revised! Write Numbers in Expanded Form (range 1,000 to 9,999) (U.S.) A B C D E F G H I J All
Revised! Write Numbers in Expanded Form (range 10,000 to 99,999) (U.S.) A B C D E F G H I J All
Revised! Write Numbers in Expanded Form (range 100,000 to 999,999) (U.S.) A B C D E F G H I J All
Revised! Write Numbers in Expanded Form (range 1,000,000 to 9,999,999) (U.S.) A B C D E F G H I J All
  
New! Write Numbers in Expanded Form (range 1 000 to 9 999) (S.I.) A B C D E F G H I J All
New! Write Numbers in Expanded Form (range 10 000 to 99 999) (S.I.) A B C D E F G H I J All
New! Write Numbers in Expanded Form (range 100 000 to 999 999) (S.I.) A B C D E F G H I J All
New! Write Numbers in Expanded Form (range 1 000 000 to 9 999 999) (S.I.) A B C D E F G H I J All
  
New! Write Numbers in Expanded Form (range 1.000 to 9.999) (Euro) A B C D E F G H I J All
New! Write Numbers in Expanded Form (range 10.000 to 99.999) (Euro) A B C D E F G H I J All
New! Write Numbers in Expanded Form (range 100.000 to 999.999) (Euro) A B C D E F G H I J All
New! Write Numbers in Expanded Form (range 1.000.000 to 9.999.999) (Euro) A B C D E F G H I J All

Writing Numbers

Writing Numbers to 10 A B C D E F G H I J All
Writing Numbers to 50 A B C D E F G H I J All
Writing Two-digit Numbers A B C D E F G H I J All
Writing Three-digit Numbers A B C D E F G H I J All
Writing Four-digit Numbers (US version) A B C D E F G H I J All
Writing Five-digit Numbers (US version) A B C D E F G H I J All
Writing Six-digit Numbers (US version) A B C D E F G H I J All
Writing Seven-digit Numbers (US version) A B C D E F G H I J All
Writing Eight-digit Numbers (US version) A B C D E F G H I J All
Writing Nine-digit Numbers (US version) A B C D E F G H I J All
Writing Four-digit Numbers (SI version) A B C D E F G H I J All
Writing Five-digit Numbers (SI version) A B C D E F G H I J All
Writing Six-digit Numbers (SI version) A B C D E F G H I J All
Writing Seven-digit Numbers (SI version) A B C D E F G H I J All
Writing Eight-digit Numbers (SI version) A B C D E F G H I J All
Writing Nine-digit Numbers (SI version) A B C D E F G H I J All

Reading Written Numbers

Reading Written Two-Digit Numbers A B C D E F G H I J All
Reading Written Three-Digit Numbers A B C D E F G H I J All
Reading Written Four-Digit Numbers A B C D E F G H I J All
Reading Written Five-Digit Numbers A B C D E F G H I J All
Reading Written Six-Digit Numbers A B C D E F G H I J All
Reading Written Seven-Digit Numbers A B C D E F G H I J All
Reading Written Eight-Digit Numbers A B C D E F G H I J All
Reading Written Nine-Digit Numbers A B C D E F G H I J All

Standard, Expanded, Written Forms Conversion

Numbers to 1000 A B C D E F G H I J K L M N O P Q R S T
Numbers to 10,000 A B C D E F G H I J K L M N O P Q R S T
Numbers to 100,000 A B C D E F G H I J K L M N O P Q R S T
Numbers to 1,000,000 A B C D E F G H I J K L M N O P Q R S T
Numbers to 10,000,000 A B C D E F G H I J K L M N O P Q R S T

Scientific Notation

Converting Between Scientific Notation and Standard Form A B C D E F G H I J

Roman Numerals

Converting Roman Numerals (up to 100) A B C D E F G H I J All
Converting Roman Numerals (up to 1000) A B C D E F G H I J All
Converting Roman Numerals (up to 3999) Standard A B C D E F G H I J All
Converting Roman Numerals (up to 3999) Compact A B C D E F G H I J All

Exponents and Roots

Squares (up to 322) A B C D E F G H I J All
Squares (up to 992) A B C D E F G H I J All
Square Roots (Perfect Squares) A B C D E F G H I J All
Squares and Square Roots (Easier than above) A B C D E F G H I J All
Cubes A B C D E F G H I J All
Cube Roots A B C D E F G H I J All
Cubes and Cube Roots (Easier than above) A B C D E F G H I J All
Exponents in Factor Form A B C D E F G H I J