Basic Arithmetic
                          
                        
                    
                    
                    Add, subtract, multiply and divide whole numbers.
                             Use manipulatives and number lines to visualize addition or subtraction:
                            
                        
                             See step-by-step solutions for doing basic multiplication or division problems:
                            
                        
                             Utilize divisibility rules to check whether one number is divisible by another:
                            
                        
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                           Long Addition
                          
                        
                    
                    
                    Perform long addition with whole numbers and decimals.
                             Get the steps for doing long addition with whole numbers:
                            
                        
                             Get the steps for doing long addition with decimals:
                            
                        
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                           Long Subtraction
                          
                        
                    
                    
                    Show your work for long subtraction with whole numbers and decimals.
                             See how to subtract whole numbers step by step:
                            
                        
                             See how to subtract decimals step by step:
                            
                        
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                           Long Multiplication
                          
                        
                    
                    
                    Learn how to perform long multiplication with whole numbers and decimals.
                             Perform the steps for long multiplication with whole numbers:
                            
                        
                             Perform the steps for long multiplication with decimals:
                            
                        
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                           Long Division
                          
                        
                    
                    
                    See how to use long division to explore relationships between whole numbers.
                             Get a step-by-step solution for long division of whole numbers:
                            
                        
                             Find the quotient and remainder for a division problem:
                            
                        
                             Use long division steps to write a fraction as a decimal:
                            
                        
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                           Fractions
                          
                        
                    
                    
                    Explore how to convert fractions to different forms.
                             See the steps for writing a fraction in reduced form:
                            
                        
                             Follow the steps to convert an improper fraction to a mixed number:
                            
                        
                             Learn how to convert an improper fraction to a mixed number:
                            
                        
                             Explore step by step how to convert a decimal to a fraction:
                            
                        
                             Get a step-by-step solution for raising a fraction to a power:
                            
                        
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                           Fraction Arithmetic
                          
                        
                    
                    
                    Add, subtract, multiply and divide simple fractions.
                             Explore step-by-step methods for adding fractions:
                            
                        
                             See how to subtract a fraction from a fraction:
                            
                        
                             Learn how to multiply fractions step by step:
                            
                        
                             View the steps for dividing a fraction by another fraction:
                            
                        
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                           Multiple Operations
                          
                        
                    
                    
                    Simplify expressions that involve multiple arithmetic operations.
                             See the steps for applying the order of operations for arithmetic:
                            
                        
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                           Base Systems
                          
                        
                    
                    
                    Investigate addition and subtraction of numbers in bases 2 through 36.
                             See the steps for doing arithmetic in base 10:
                            
                        
                             See each step of long arithmetic with binary numbers:
                            
                        
                             Perform step-by-step arithmetic in an octal base system:
                            
                        
                             Learn the steps for adding or subtracting integers in multiple bases:
                            
                        
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                           Quantity Calculations 
                          
                        
                    
                    
                    Perform arithmetic calculations with quantities while converting the units.
                             Follow the steps to add or subtract quantities with different units:
                            
                        
                             See the steps for multiplying quantities with different units:
                            
                        
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