Lesson Menu Main Idea and New Vocabulary Example 1:Compare Rational Numbers Example 2:Compare Rational Numbers Example 3:Real-World Example Example 4:Real-World.

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Presentation transcript:

Lesson Menu Main Idea and New Vocabulary Example 1:Compare Rational Numbers Example 2:Compare Rational Numbers Example 3:Real-World Example Example 4:Real-World Example Key Concept:Fraction-Decimal Equivalents

Main Idea/Vocabulary Compare and order fractions and decimals. rational numbers common denominator least common denominator (LCD)

Example 1 Compare Rational Numbers Replace the O with, or = to make O a true sentence. Graph each rational number on a number line. Mark off equal-size increments of between –4 and –3. __ 1 8 Answer: The number line shows that

Example 1 CYP A.< B.> C.= Replace the O with, or = to make O a true sentence.

Example 2 Compare Rational Numbers The LCD of the denominators 4 and 5 is 20. Answer: Replace the O with, or = to make O a true sentence.

Example 2 CYP A.< B.> C.= Replace the O with, or = to make O a true sentence.

Example 3 FOOTBALL In a game against Virginia Tech, Florida State Seminoles quarterback Christian Ponder completed 11 out of 19 passes. The next week against Georgia Tech, he completed 16 out of 27 passes. Against which team did he complete the greater fraction of his passes? Since the denominators are large, write and as decimals and then compare. Answer: He completed a greater fraction of his passes against Georgia Tech. 11 ÷ 19 ≈ ÷ 27 ≈ Divide.

Example 3 CYP A.Mrs. Park’s class B.Mr. Randazzo’s class C.The fraction is the same for both classes. PENCILS In Mrs. Park’s math class, 5 out of 31 students are using mechanical pencils. In Mr. Randazzo’s class 3 out of 27 students are using mechanical pencils. In which class are a greater fraction of students using mechanical pencils?

Example 4 Line up the decimal points and compare using place value. List the numbersin order from least to greatest. 0.70= 0.7 Annex a 0. __ =

Example Annex a = 0.64 __ Answer: So, the order of the numbers is

Example 4 Check Graph each number on a number line. The number line confirms the order of the numbers is correct.

Example 4 CYP A. B. C. D. List the numbers in order from least to greatest.

Key Concept 5