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Brkich Notes - 2.1 – Compare Rational Numbers PLO: demonstrate an understanding of rational numbers by - comparing and ordering rational numbers - solving problems that involve arithmetic operations on rational numbers a number that can be expressed as Rational Number: and , where a and b are integers 0 Example 1: Compare and order rational numbers Compare and put in order the following rational numbers. -1.2 0. 5 Method 1: place the rational numbers on a number line -2 -1 0 1 2 Method 2: rewrite all the numbers in the same form – fraction or decimal As a Fraction 2.2 Math 9 2 2 10 2 1 5 As a Decimal 2.2 4 5 4 5 0.8 7 8 7 8 0.875 0. 5 5 9 0. 5 7 8 7 8 0.875 2.1 – Compare Rational Numbers Page 1 of 2 Brkich Example 2: Compare rational Numbers Which fraction is greater? Method 1: Equivalent Fractions Method 2: Decimals 0.75 -2 0. 6 -1 0 1 2 Example 3: Identify a Rational number between two given rational numbers Identify a fraction between: -0.6 and -0.7 -0.7 -0.6 -0.5 -0.4 -0.3 One decimal number between -0.6 and -0.7 is -0.65 Convert to fractions: Assign pg. 51, #1−4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 23 If done early - Math Link – Integer card game on pg. 54 Math 9 2.1 – Compare Rational Numbers Page 2 of 2