Lesson 4
Practice Makes Perfect
Prowess with powers
Page 153
Your answer :
3( 10 − 1 ) + 7( 10 − 2 ) + 6( 10 − 3 )
= .376
1( 52 ) + 1( 51 ) + 4( 50 )
= 34
1( 22 ) + 0( 21 ) + 1( 20 )
= 5
3( 42 ) + 2( 41 ) + 1( 40 )
= 60
⎫ ⎪ ⎪ ⎬ ⎪ ⎪ ⎭ This set contains a mistake .
You are correct.
3( 42 ) + 2( 41 ) + 1( 40 ) = 57, not 60.
Did you notice that in the last few questions a new idea has been developed? It is possible to write any number you please as a sum of multiples of powers of numbers. This has important consequences.
However, before you get to that you should answer the Self-Test Questions for Lesson 4, They are in the Appendix.
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