New SAT Math - Calculator

This subject covers the use of a calculator to solve mathematical problems on the New SAT, enhancing students' problem-solving skills and efficiency.

Calculator Basics on the SATEfficient Arithmetic and Order of OperationsFractions, Decimals, and Conversions
Solving Equations and SystemsGraphing Functions and Analyzing GraphsWorking with Statistics and Data
Solving Finance and Shopping ProblemsGeometry and Measurement ApplicationsTime, Distance, and Rate Problems
When to Use Your CalculatorAvoiding Common Calculator PitfallsDouble-Checking and Estimating
Calculator Basics on...Efficient Arithmetic...Fractions, Decimals,...Solving Equations an...Graphing Functions a...Working with Statist...Solving Finance and ...Geometry and Measure...Time, Distance, and ...When to Use Your Cal...Avoiding Common Calc...Double-Checking and ...
Study Strategies

Double-Checking and Estimating

Quick Checks for Accuracy

Estimate your answers before using the calculator. This helps you spot mistakes and avoid wild guesses. After calculating, ask yourself if the answer makes sense given the question.

Steps:

  • Round numbers to make quick mental estimates.
  • Compare your estimate with the calculator's answer.
  • If they're not close, re-calculate or check for entry errors.

Examples

  • Estimating \( 97 \times 23 \) as about \( 100 \times 20 = 2000 \) before using the calculator.

  • Rounding \( 4.78 \) to 5 for a quick check before doing the exact calculation.