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Substitution
Video 20 on www.corbettmaths.com
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Question 1: If a = 7 b = 10 c = 3 d = 8 and e = 15
Find the value of each expression.
(a) a + 5 (b) b − 4 (c) c + d (d) e − d
(e) 2a (f) 4b (g) 3e (h) 5c
(i) (j) (k) (l)
(m) a² (n) b² (o) c² (p) d²
(q) 2a + 1 (r) 3b − 7 (s) 9c + 11 (t) 4e − 45
(u) 2a + 3c (v) 4d − b (w) 5a + 2d (x) e − 4c
(y) 30 − 4a (z) 15 − 3c
Question 2: If f = 5 g = 6 h = 4 and i = 2
Find the value of each expression.
(a) fg (b) hi (c) fgh (d) i³
(e) √h (f) 3f + 2g (g) 5h + 7i (h) 9h − 7i
Question 3: If a = −2 b = 5 c = −6 d = 10 and e = 9
Find the value of each expression.
(a) a + 4 (b) b − 8 (c) c + e (d) a − d
(e) d − c (f) 2c (g) 7a (h) −7b
(i) 2d + 3c (j) 6e + 3a (k) 5a + 7 (l) 20 + 4a
(m) ac (n) 40 − d (o) 2e − a (p) bd + a
(q) (r) (s) √e (t) c²
© CORBETTMATHS 2016
