Page 22 - ACE YR IGCSE A TOP APPR' TO MATHS
P. 22
Powers and roots
1 Evaluate each of the following and write your answer in index form.
(a) 2 × 2 –5
3
[2]
1
2
(b) 4 × 8 ÷ 2 5
[2]
(c) 3 ÷ 9 × 27 2
4
–2
[2]
(d) 5 × 5 7
(5 × 5 )
0
–3 –3
[2]
2
( ) –2 ( ) –1 0 ( ) –2
1
1
1
A = 5 B = 5 C = 25 D = 5 E = 125
–2
From the list of numbers, write down
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(a) the letter with the smallest number
[2]
(b) the letter with the biggest number
[2]
(c) the two letters with the equal numbers
[2]
3 Evaluate without using calculator, [7 + (–1) ] − [2(–2) ÷ 4] , show all your working clearly.
121
9
[3]
Chapter 1A Numbers 17
Chapter 1A.indd 17 15/03/2022 10:27 AM
