OS Fundamentals Quiz Answer Key - Edubirdie

University:
College
Course:
College Computer Science
Academic year:

2023
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28

Pages:

4
Author:

anon

Hwk: Pg. 55: Simplify #1. g) 3 −4 − =− 3 4 + 2 5 =− 3 ×5 4 ×5 =− 15 20 = + + −2 5 =− 2 ×4 5 ×4 8 20 −15+8 20 =− 7 20 So, LCD(4,5)=20 3 4 ( − − 2 5 ) Order of Operations with Rational Numbers - BEDMAS is still valid and must be followed when simplifying expressions with rational numbers. Remember to: -Change mixed numbers to improper fractions -Simplify double signs -Reduce to lowest terms Example: Simplify the following. a) − ( 9 4 ) × (− ) ÷ (− ) ( 9 4 ) × (− ) × ( ) = − = 10 21 10 21 7 −45 −9 ×−10 ×7 4 ×21 ×−45 =− 1 ×5 ×1 2 ×3 ×5 =− 1 6 b) − 3 7 − −7 2 =− 3 7 − 1 2 =− 3 7 − 3 2 = 45 7 (−3)×2 7 ×2 =− 6 14 − ÷ × − 21 14 3 1 −7 3 ← multiply fraction ← Find the LCD(2,7)=14 3 ×7 2 ×7 = −6−21 14 = −27 14 7 c)⎡ 12 ÷ (− 14)⎤ − ⎣ ⎦ 7 1 −14 = ⎡ 12 × ⎣ = 1 ×1 12 ×(−2) =− 1 24 =− 1 ×1 24 ×1 =− 1 24 = − ⎤− ⎦ 1 8 3 8 × × 5 1 5 3 1 ×5 8 ×1 5 8 − 5 ×3 8 ×3 − 15 24 − −16 24 =− 2 3 ( )⎤⎦ × (− ) ÷ =( − ) × (− ) × =( − ) × (− ) × =( − ) × (− ) = × (− ) 3 d) ⎡ 16 + − ⎣ 3 16 3 16 3 8 3 ×4 4 ×4 12 16 3−12 16 −9 16 3 8 3 4 3 ×1 16 ×1 = 3 4 ×− 3 2 3 2 4 1 3 2 3 2 1 4 1 1 =− 9 16 = 9 ×3 16 ×2 = 27 32 ×− 3 2

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