Lesson 4
Practice Makes Perfect
Prowess with powers
Page 150
Your answer :
1(23) + 0(22) + 0(21) + 1(20)
= 9
3(1001) + 4(1000)
= 304
7(103) + 6(102) + 2(101) + 1(100)
= 7, 621
1(14) + 1(13) + 1(12) + 1(11) + 1(10)
= 5
⎫⎪⎪⎬⎪⎪⎭ This set contains a mistake.
Well, let’s see:
1(23) + 0(22) + 0(21) + 1(20)
= 1(8) + 0(4) + 0(2) + 1(1)
= 8 + 0 + 0 + 1
= 9;
3(1001) + 4(1000)
= 3(100) + 4(1)
= 300 + 4 = 304;
7(103) + 6(102) + 2(101) + 1(100)
= 7(1000) + 6(100) + 2(10) + 1(1)
= 7000 + 600 + 20 + 1
= 7, 621;
1(14) + 1(13) + 1(12) + 1(11) + 1(10)
= 1(1) + 1(1) + 1(1) + 1(1) + 1(1)
= 5.
All correct. Return to Page 129 and try again.
