Construction Math Free Test

To calculate the perimeter, add up all four sides of the rectangle. The length of the frame will be the length of the poster, 32 in, plus two more inches on each side;
32 in+2 in+2 in = 36 in.
The width of the frame is the width of the poster, 24 in, plus two inches on each side;
24 in+2 in+2 in = 28 in.
To find the perimeter add the two widths and two lengths together;
28 in + 28 in +36 in +36 in = 128 in.

The tax for this purchase is calculated by multiplying the pre-tax price by the percent of tax written in decimal form;
$20x0.0715 = $1.43. Then, add the tax to the original sales amount for the total, $20+ $1.43 = $21.43; $21.43 is the total.

Volume is calculated by multiplying the length, height, and width together. The new length is 10 16 - 3 - 3 = 10. The height is
determined by the squares that are removed, 3". The volume is 300 in3,3x 10x 10 = 300.

Divide the size of the walkway, 50 cubic feet, by the amount that each bag makes, 15 cubic feet; 50/15 =3.3. A little over 3 bags are needed to fill the walkway. Therefore, 4 bags need to be purchased.

To figure out the painter's total service charge, multiply her hourly rate, $35/hr and the number of hours she worked, 6 hours; $35/hrx 6 hours = $210. Take this total and add the cost of the paint $32; $210+$32 = $242.

The water heater is marked up 15% from $1,850, $1,850x 1.15 = $2,127.50,
and then discounted 25%, $2,127.50 x 75 = $1,595.63. The last piece is to add the tax, $1,159.63 x.065 = $103.72, To the total price, $1,595.63 + $103.72 = $1,699.35.

$5.50 per 8’ length x 2 (8’ lengths) x 2 kitchen counters = $22. Using the plywood would be more expensive.

Find the smallest number of boxes for each part. 22 cans are needed and are sold in sets of 5, so 5 boxes are necessary, 5x5
provides 25 cans. 22 baffles are also needed and they are sold in sets of 8, so only 3 boxes are necessary, 3x8 provides 24
baffles. It is okay to have different amounts of each, as long as there are enough supplies for the job.

The first cleaner costs $2.75 for 44 ounces. Since the cost per ounce is needed, divide $2.75 by 44 to get about $.0625 per
ounce, or about $.06 per ounce. The second cleaner costs $3.70 for 55 ounces;

$3.70 + 55 = $.067 per ounce,

or about $.07 per ounce. Therefore, the first cleaner is the better buy because it is cheaper per ounce.

The final calculation is for two houses, so it may be easier to find out how much it costs to clean one house and then double it at the end. One room in the house costs $25 so the additional six rooms will cost $27,6 x $4.50 = $27, so the total for one house is $52, $25 + $27 = $52. We are trying to find the cost for two houses, so by doubling the cost for one house we find the total cost is $104, $52x2 = $104.

Take the total money and divide it by the cost to find out how many can be purchased, $854/$58 = 14.72. For this problem you must round down to 14 drills. If you try to purchase 15 drills the total bill will be too high, 15 x $58 = $870.

The customer has been overcharged by $7.80, so subtract this mistake from the total bill: $37.24-$7.80 = $29.44.

There are 3.8 L per 1 gallon. To figure out how many liters Teresa will need for her mix, convert gallons to liters by multiplying 13 gal x 3.8 L/gal = 49.4 L.

1. Convert feet to inches. Multiply 18' x 12" = 216"
2. Divide by 12" o.c.
216" / 12 = 18
3. Add 1 (for the end)
18 + 1 = 19

Calculating change requires subtraction. Take the money the customer gives and subtract the total bill, $50 - $16.54 = $33.46.