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1-7 Multiplying Rational Numbers

Video Tutor Help Using properties of multiplicationUsing properties of multiplication (1-7) Multiplying rational numbersMultiplying rational numbers (1-7) Multiplying Fractions Multiplying Negative Fractions Multiplying Decimals Khan Academy Dimensional analysis Multiplying and subtracting fractions Brain Pop 1-7 Multiplying Rational Numbers Multiplying Negative Numbers When number systems were expanded to include negative numbers, rules had to be formulated so that multiplication would be consistent regardless of the sign of the operands.

Video Tutor Help Finding absolute value Comparing and ordering integers using absolute value or a number line Adding integers using rules Subtracting integers Subtracting integers to solve problems Adding integers using a number line Multiplying integers Dividing integers to solve problems Writing a fraction as a terminating decimal Writing a fraction as a repeating decimal Ordering fractions and decimals Writing terminating decimals as fractions Ordering rational numbers

Worksheets Daily Notetaking Guide Worksheets Version A Practice, Guided Problem Solving Lesson 1-7 Practice 1-7 Guided Problem Solving 1-7

Vocabulary Practice Vocabulary 1A: Graphic Organizer Vocabulary 1B: Reading Comprehension Vocabulary 1C: Reading/Writing Math Symbols Vocabulary 1D: Visual Vocabulary Practice Vocabulary 1E: Vocabulary C Vocabulary 1F: Vocabulary Review Puzzle Vocabulary (Electronic) Flash Cards

Additional Lesson Examples Step-by-Step Examples Lesson 1-7

Lesson Readiness Lesson Quiz Problem of the Day Lesson 1-7

Multiplying Fractions To multiply fractions, multiply the numerators and multiply the denominators = 8 15

Study Tip Negative Fractions: can be written or

Teaching Tip Use the rules for multiplying integers to determine the sign of the product Negative x Negative = Positive Negative x Positive = Negative Positive x Positive = Positive Positive x Negative = Negative

Teaching Tip To multiply mixed numbers, first rename them as improper fractions.

Example 3-1a Find. Write the product in simplest form. Multiply the numerators. Multiply the denominators. Answer: Simplify. The GCF of 10 and 40 is 10. Multiply Fractions

Example 3-2a Find. Write the product in simplest form. Multiply the numerators and multiply the denominators. Answer: Simplify. Divide 8 and 6 by their GCF, 2. Simplify Before Multiplying

Example 3-3a Find. Write the product in simplest form. Multiply the numerators and multiply the denominators. Answer: Simplify. Divide 2 and 4 by their GCF, 2. Multiply Negative Fractions

Example 3-3a Divide 16 and 4 by their GCF, 4. Simplify. Multiply the denominators. Multiply the numerators. Find Write in simplest form. 4 1 Multiply Mixed Numbers