Arithmetic Step by Step
A lightweight execution-visualization book.
Place Value
Read a Three-Digit Number
Write a Number in Expanded Form
Compare Two Three-Digit Numbers
Round to the Nearest Ten
Estimate a Sum by Rounding
Addition
Add Within 20 Using Make Ten
Add Two-Digit Numbers Without Carrying
Add Two-Digit Numbers With Carrying
Add Three-Digit Numbers With Carrying
Add a Column of Numbers
Subtraction
Subtract Two-Digit Numbers Without Borrowing
Subtract Two-Digit Numbers With Borrowing
Subtract Across Zeros
Subtract Three-Digit Numbers With Borrowing
Multiplication Basics
Multiplication as Repeated Addition
Memorize a Times-Table Row
Multiply by 10 and 100
Single-Digit Multiplication With a Carry
Long Multiplication
Multiply a 2-Digit by 1-Digit Number
Multiply a 2-Digit by 2-Digit Number
Multiply a 3-Digit by 2-Digit Number
Multiply When the Multiplier Has a Zero Digit
Division
Division as Equal Sharing
Division With a Remainder
Long Division
Long Division
Factors and Multiples
List Factors
Prime Check
Prime Factorization
GCD by Listing
LCM by Listing
Fractions
Equivalent Fractions
Simplify a Fraction
Compare Fractions
Mixed and Improper Fractions
Add Fractions — Same Denominator
Add Fractions — Unlike Denominators
Subtract Fractions
Multiply Fractions
Divide Fractions
Decimals
Decimal Place Value
Compare Decimals
Add Decimals
Subtract Decimals
Multiply Decimals
Divide a Decimal by a Whole Number
Order of Operations
Order of Operations
Order of Operations
Two-Step Word Problem
Estimate Then Solve