Survey
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Practice Problems - Lecture 1 Problem 1. Determine whether the following statements are true or false: (a) Every integer is a whole number; (b) Some rational numbers are whole numbers; (c) Every natural number is an integer; (d) Every irrational number is an integer. Problem 2. Evaluate: (a) −24 ; (b) (−2)5 ; (c) −2 · 34 ; (d) −4 · 53 . Problem 3. Evaluate: (a) 9 · 3 − 16 ÷ 4; 4 (b) 6(−5) − (−3)(2) ; √ 3 (c) (4 + 25); − 2 )(−2 2 3 11 5 − − ; (d) − − − 8 5 2 10 −8 + (−4)(−6) ÷ 12 (e) 4 − (−3) Problem 4.Identify the property used: (a) 6 · 12 + 6 · 15 = 6(12 + 15); 1 (b) (t − 6) · = 1 (assume t 6= 6); t−6 (c) (75 − y) + 0 = 75 − y; (d) 5(t +3) = (t +3) · 5; 1 1 =5 x· . (e) (5x) x x Problem 5. Simplify: (a) (b) 8 + (a + 7); 1 (c) − (20m + 8y − 32z); 4 3 16 32 40 (d) y+ z− . 8 9 27 9 10 (22z); 11 1 2 Answers: 1. (a) False; (b) True; (c) True; (d) False. 2. (a) −16; (b) −32; (c) −162; (d) −500. 5 6 3. (a) 23; (b) 18; (c) −12; (d) − ; (e) − . 8 7 4. (a) Distributive; (b) Multiplicative Inverse; (c) Additive Identity; (d) Commutative; (e) Associative. 2 4 5 5. (a) 20z; (b) a + 15; (c) −5m − 2y + 8z; (d) y + z − . 3 9 3