2.4.1 Try some yourself
Activity 25
Write the following as a number to a single power:
(a) 26 ÷ 22
(b) 1010 ÷ 107
(c) 78 ÷ 74
Answer
(a) 26 ÷ 22 = 2(6 − 2) = 24
(b) 1010 ÷ 107 = 10(10 − 7) = 103
(c) 78 ÷ 74 = 7(8 − 4) = 74
Activity 26
Express as powers of ten
(a) a million
(b) a thousand
(c) a million divided by a thousand
Answer
(a) a million = 1 000 000 = 106
(b) a thousand = 1 000 = 103
(c) 106 divided by 103 = 106–3 = 103 = a thousand