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## 2.3 Mathematics

Using mathematics to express ideas and solve problems.

• 2.3.1 Computation
• Add, subtract, multiply, and divide with whole numbers, fractions, decimals, and percents.
• Calculate averages, ratios, proportions, and rates.
• Convert decimals to fractions and fractions to decimals.
• Convert fractions to percents and percents to fractions.
• Convert decimals to percents and percents to decimals.
• Understand relationships between numbers and identify and understand patterns.
• 2.3.2 Measurement and estimation
• Take measurements of time, temperature, distances, length, width, height, perimeter, area, volume, weight, mass, velocity, and speed.
• Use and report measurements correctly.
• Correctly convert from one measurement or unit to another (e.g., from English to metric or International System of Units (SI), or Fahrenheit to Celsius).
• 2.3.3 Application
• Use appropriate mathematical formulas and techniques to solve problems.
• Translate practical problems into useful mathematical expressions.