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Review from Semester 1

Review from Semester 1. Date: Feb 11, 2013 Whole Numbers Fractions and Decimals Ratio Proportion Percent. Homework Worksheet. Real Number System. Operations with Numbers. Addition Subtraction Multiplication Division. Whole numbers Fraction/Decimals Integers. Review. Ratio

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Review from Semester 1

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  1. Review from Semester 1 Date: Feb 11, 2013 Whole Numbers Fractions and Decimals Ratio Proportion Percent • Homework • Worksheet

  2. Real Number System

  3. Operations with Numbers • Addition • Subtraction • Multiplication • Division • Whole numbers • Fraction/Decimals • Integers

  4. Review • Ratio • A ratio is a relationship where for every x units of one quantity there are y units of another quantity. • x to y • x:y • x/y • Proportion • A mathematical expression that two ratios are equal is called a prop0rtion

  5. Solve • Write each rate as unit rate: • 60 Km in 12 hours • 26 cm in 13 s A school district requires a 15:1 ratio of students to adults on a field trip. About how many trips will be needed for a field trip with 72 students?

  6. Solve • Anya rode 4 miles on her bicycle in 20 minutes. At this rate, how long will it take her to ride 24 miles? • Indonesia has more than 13,000 islands, and over 20 languages are spoken there. What is the ratio of islands to languages spoken?

  7. Percent • A percent is a special kind of ratio in which the first term in compared to 100. • Solve: • - Easton won Best in Show in 60% of the shows he entered. In how many shows Easton entered if he won Best in Show 15 times last year?

  8. Solve • Jan and Kim built model cars for a Science Project . Kim’s car travelled 140% as far as Jan’s car. How can you write 140% as a fraction and decimal?

  9. Closure • Fraction, decimals and percentsare three ways to shows portions of whole

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