Exam 6: Whole Numbers

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If a manufacturer recommends one lighting fixture for every 80 square feet of ceiling area, how many light fixtures are needed for a warehouse that measures 100 feet by 320 feet?

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100 feet × 320 feet = 32,000 square feet
32,000 square feet divided by 80 square feet = 400 light fixtures

If two people can install 75 square feet of siding per hour, how long will it take four people working at the same speed to side a house with walls of 16 feet by 20 feet, 15 feet by 20 feet, 20 feet by 18 feet, and 11 feet by 20 feet?

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16' × 20' = 320 sq. ft
15' × 20' = 300 sq. ft.
20' ×18' = 360 sq. ft.
11' × 20' = 220 sq ft.
Total = 1200 sq. ft. divided by 150 sq. ft. per hour = 8 hours

32 divided by 4 equals ____________________.

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8

The number that is to be subtracted from another number is called the __________.

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A contractor hires three plumbers to work 9 hours a day for five days and three laborers to work 7 hours for one day. The total number of hours worked is ____________________.

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If every 10 feet of pipe requires 3 strap hangers and each strap hanger requires 2 screws, ____________________ screws are required for 50 feet of pipe.

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655 plus 2,149 plus 113 plus 84 equals ____________________.

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The National Electrical Code® requires that no point along a wall can be more than 6 feet from an electrical outlet. How many receptacles are required for a wall that is 20 feet long?

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If you buy four items that cost $0.79, $1.23, $2.92, and $0.38 and pay with a ten-dollar bill, how much change should you receive?

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If three 30-inch pieces of wood are cut from an eight-foot board, how much will be left over?

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8 × 7 = ____________________.

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4 × 18 = ____________________

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From a 250-foot spool of wire, an electrician uses pieces of the following lengths: 12 feet, 39 feet, 86 feet, and 27 feet. How much is left?

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If you make electrical connections in 47 device boxes and use 3 wire nuts in each box, you will need ____________________ wire nuts.

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The number from which another number is to be subtracted is called the __________.

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If a lighting circuit can supply 1800 watts of incandescent light, how many 120-watt light fixtures can it support?

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656 divided by 8 equals ____________________.

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641 minus 87 equals ____________________.

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The sum of 43 and 51 is ____________________.

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In one week you worked 7 hours, 7 hours, 6 hours, 9 hours, and 4 hours. Your total hours for the week are ____________________.

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