Page 82 - Basic College Mathematics with Early Integers

SE CT I O N 1. 6 I MULTIPLYING WHOLE NUMBERS AND AREA 59

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105. a. Rewrite 3 5 as repeated addition. 106. a. Rewrite 4 5 as repeated addition.
b. Explain why there is more than one way b. Explain why there is more than one way
to do this. to do this.

Find and explain the error in each multiplication problem. See the second Concept Check in this section.

107. 203 108. 31
* 14 * 50
812 155
203
1015

Fill in the missing digits in each problem.

109. 4 110. 7
* 3 * 6
126 171
3780 3420
3906 3591

111. Explain how to multiply two 2-digit numbers using 112. In your own words, explain the meaning of the area
partial products. of a rectangle and how this area is measured.

113. A window washer in New York City is bidding for 114. During the NBA’s 2007–2008 regular season, Kobe
a contract to wash the windows of a 23-story Bryant of the Los Angeles Lakers scored 150 three-
building.To write a bid, the number of windows in point field goals, 775 two-point field goals, and 623
the building is needed. If there are 7 windows in free throws (worth one point each). How many
each row of windows on 2 sides of the building and points did Kobe Bryant score during the 2007–2008
4 windows per row on the other 2 sides of the regular season? (Source: NBA)
building, find the total number of windows.