Self-Test Questions : Lesson 5
Coefficients
New names for old
1.
In 4( 32 ) + 8( 31 ) + 6( 30 ) , what are the coefficients, what are the exponents and what are the base numbers?
2.
Find the sums of:
a . 5( 103 ) + 3( 102 ) + 8( 101 ) + 6( 100 ) =
b . 0( 103 ) + 6( 102 ) + 0( 101 ) + 0( 100 ) =
c . 8( 103 ) + 1( 102 ) + 1( 101 ) + 4( 100 ) =
3.
a . In the decimal number 438, what is the coefficient of 102 ?
b . In 638, what is the coefficient of 100 ?
c . In 5,279, what is the coefficient of 101 ?
d . In 6,436, what is the coefficient of 103 ?
4.
How do you know which power of ten 4 multiplies in the number 649?
5.
What is the coefficient of
a . 10 − 1 in 398.45?
b . 10 − 2 in 49.60?
c . 10 − 1 in 648?
d . 10 − 3 in 1.59834?
6.
Which of these expressions could be the expanded form of a decimal number? Write the decimal numbers.
a . 1( 410 ) + 5( 610 ) + 3( 210 )
b . 0( 102 ) + 0( 101 ) + 1( 100 ) + 8( 10 − 1 )
c . 1( 101 ) + 2( 102 ) + 6( 103 )
d . 4( 102 ) + 9( 101 ) + 0( 100 ) + 0( 10 − 1 )
In Lesson 5 you learned how coefficients are used to write decimal numbers. Coefficients, however, are not exclusively the property of the decimal system - as you will soon see.
Turn to Lesson 6 beginning on Page 178.
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