Lesson 6
The Octal System
From eight to ten
Page 215
Your answer :
208
= 1610
2008
= 12810
1748
= 12410
1, 1118
= 58510
⎫⎪⎪⎬⎪⎪⎭ This group contains a mistake.
Well, let’s check by writing the octal numbers in expanded form:
208
= 2(81) + 0(80)
= 2(8) + 0(1) = 1610;
2008
= 2(82) + 0(81) + 0(80)
= 2(64) + 0(8) + 0(1) = 12810;
1748
= 1(82) + 7(81) + 4(80)
= 1(64) + 7(8) + 4(1) = 12410;
1, 1118
= 1(83) + 1(82) + 1(81) + 1(80)
= 1(512) + 1(64) + 1(8) + 1(1) = 58510.
They’re all correct. Return to Page 182 and try again.
