Basic Math

Fundamental mathematical operations and concepts for everyday use.

Addition and SubtractionMultiplication and DivisionUnderstanding Numbers and Place Value
Working with FractionsDecimals and PercentagesOrder of Operations
Budgeting and Money MathCooking and MeasurementsTelling Time and Schedules
Estimation and Mental MathWord Problem Solving
Addition and Subtrac...Multiplication and D...Understanding Number...Working with Fractio...Decimals and Percent...Order of OperationsBudgeting and Money ...Cooking and Measurem...Telling Time and Sch...Estimation and Menta...Word Problem Solving
Study Strategies

Estimation and Mental Math

Quick and Clever Calculations

Estimation and mental math help you solve problems fast, without needing paper or a calculator.

  • Round numbers to make adding or subtracting easier
  • Use tricks like breaking numbers into friendly chunks

Being able to estimate helps you check if your answer makes sense, whether you're shopping or splitting a pizza!

Examples

  • Estimating the total cost of five $3 items by rounding to $15.

  • Quickly adding 9 + 7 by thinking of 10 + 6 instead.

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Word Problem Solving