Main Idea and New Vocabulary NGSSS

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Presentation transcript:

Main Idea and New Vocabulary NGSSS Key Concept: Inverse Property of Multiplication Example 1: Find a Multiplicative Inverse Key Concept: Divide Fractions Example 2: Divide Fractions and Mixed Numbers Example 3: Divide Fractions and Mixed Numbers Example 4: Real-World Example Five-Minute Check Lesson Menu

Divide rational numbers. multiplicative inverses reciprocals Main Idea/Vocabulary

MA.8.A.6.4 Perform operations on real numbers (including integer exponents, radicals, percents, scientific notation, absolute value, rational numbers, and irrational numbers) using multi-step and real world problems. NGSSS

Key Concept

Find a Multiplicative Inverse Write the multiplicative inverse of . Write as an improper fraction. Since the multiplicative inverse of is . Answer: Example 1

Write the multiplicative inverse of – . B. C. D. Example 1 CYP

Key Concept 3

Divide Fractions and Mixed Numbers Find . Write in simplest form. The multiplicative inverse of Divide –2 and 8 by their GCF, 2. = Multiply. Answer: Example 2

Find . Write in simplest form. A. B. C. D. Example 2 CYP

Divide Fractions and Mixed Numbers Find . Write in simplest form. The multiplicative inverse of Divide 4 and 8 by their GCF, 4. Example 3

Divide Fractions and Mixed Numbers Multiply. Answer: Example 3

Find . Write in simplest form. A. B. C. 8 D. 36 Example 3 CYP

TELEVISION A television station shows a holiday movie repeatedly for hours. It takes 150 minutes to show the movie with commercial breaks. How many times does the television station show the movie that day? Example 4

Multiply to convert 150 minutes to hours. Divide by common factors and units. Multiply. Example 4

Multiply by the multiplicative inverse of which is Divide by common factors. Example 4

Answer: The television station shows the movie 5 times. Simplify. Answer: The television station shows the movie 5 times. Example 4

COSTUMES Each elf costume for the school play requires yards of fabric COSTUMES Each elf costume for the school play requires yards of fabric. How many elf costumes can be made from a bolt of fabric that contains 13 yards? A. 5 costumes B. 8 costumes C. 13 costumes D. 21 costumes Example 4 CYP

Find the multiplicative inverse of 9. B. C. 0 D. Five Minute Check 1

Find the multiplicative inverse of . B. C. D. Five Minute Check 2

Find . Write in simplest form. A. B. C. D. Five Minute Check 3

Find . Write in simplest form. A. B. C. D. Five Minute Check 4

Find . Write in simplest form. A. –1 B. 1 C. D. Five Minute Check 5

A salad dressing requires cup of oil and cup of vinegar per serving A salad dressing requires cup of oil and cup of vinegar per serving. How much oil is in a half serving? A. cup C. cup B. cup D. 1 cup Five Minute Check 6