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WEEK 1
WHOLE NUMBERS
CONTENTS
WHOLE NUMBERS IN STANDARD FORM
A number is said to be in standard form if it is expressed in the form of A x 10n. Where and is an integer (positive or negative whole numbers). Standard form is very useful in field of sciences and social sciences for easy presentations and analysis. Examples of numbers in standard form includes: 4 x 109, 5.8 x 102, 5.62 x 104, etc
Examples:
(a) 90 000 000 (b) 6 000 000 000 000 000 000 (c) 34256.189 (d) 879.45
Solutions
(a). 90 000 000 = 9 x 10 000 000 = 9 x 10 x 10 x 10 x 10 x 10 x 10 x 10 = 9 x 107
(b). 6 x 1000 000 000 000 000 000 = 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 = 6 X 1018
(c). 34256.189 = 3.4256189 x 10 000 = 3.4256189 x 104
(d). 879.45 = 8.7945 x 100 = 8.7945 10 x 10 = 8.7945 x 102
(a). 7.879 x 105 (b). 6.209 x 104 (c). 4.231 x 106
Solutions:
(a). 7.879 x 105 = 7.879 x 10 x 10 x 10 x 10 x 10 = 7.879 x 100 000 = 787900
(b). 6.209 x 104 = 6.209 x 10 x 10 x 10 x 10 = 6.209 x 10 000 = 62090
(c). 4.231 x 106 = 4.231 x 10 x 10 x 10 x 10 x 10 x 10 = 4.231 x 1 000 000 = 42310000
CLASS ACTIVITY
(d) 0.000400254 (e) 0.000000000235
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