Selina solutions

Selina solutions

Grade 6

Framing Algebraic Expressions (Including Evaluation) | Exercise 21

Question 13

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Question 13

Q13) If a = 5 and b = 6, evaluate :

(i) 3ab

(ii)\ 6a^2b

(iii)\ 2b^2

Solution:

(i) 3ab

= 3 x a x b

= 3 x 5 x 6

= 90

(ii)\ 6a^2b

= 6 x a x a x b

= 6 x 5 x 5 x 6

= 900

(iii)\ 2b^2

= 2 x b x b

= 2 x 6 x 6

= 72

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