Download PDF by LearningExpress (Organization): Math for the trades

By LearningExpress (Organization)

ISBN-10: 1576855155

ISBN-13: 9781576855157

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1 ᎏᎏ 4 ÷ ᎏ12ᎏ = ᎏ14ᎏ × ᎏ21ᎏ = ᎏ24ᎏ = ᎏ12ᎏ Team-LRN Arithmetic Review CHAPTER 3 MATH FOR THE TRADES Comparing Fractions Sometimes it is necessary to compare the size of fractions. This is very simple when the fractions are familiar or when they have a common denominator. Examples: 1 ᎏᎏ 2 < ᎏ34ᎏ and 11 ᎏᎏ 18 > ᎏ158ᎏ If the fractions are not familiar and/or do not have a common denominator, there is a simple trick to remember. Multiply the numerator of the first fraction by the denominator of the second fraction.

602 since there have to be three decimal places in the answer. If there are not enough digits in the answer, add in zeros in front of the answer until there are enough. 2. 2 6 There are three total decimal places in the problem; therefore, the answer must contain three decimal places. Starting to the right of 6, move left three places. 006. Dividing Decimals Dividing decimals is a little different from integers for the set-up, and then the regular rules of division apply. It is easier to divide if the divisor does not have any decimals.

6 gallons. Therefore, the minimum number of cans she will have to purchase is six cans. 14. c. In order to compare these two vendors, they both need to be converted to a unit price. The easiest comparison would be price per pound, which is calculated by dividing the total cost by the number of pounds. 29/lb. 45/lb. 16. 15. c. Add up the various stages in order to figure out the total amount of time he must spend per tree; 20 min + 120 min + 40 min = 180 min (3 hrs). It takes him 3 hours per tree and he has 6 trees to trim; 6 trees × 3 hrs/tree = 18 hrs total.

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Math for the trades by LearningExpress (Organization)


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