01280nam a2200217Ia 4500 CTU_132781 210402s9999 xx 000 0 und d 567000 697.0001 D498 DeVore, Russell Practical problems in mathematics for heating and cooling technicians Russell DeVore Clifton Park, NY Thomson/Delmar Learning 2005 From basic arithmetic to using formulas, this fully updated edition applies essential practical math skills directly to the field of heating and cooling technology. All math concepts use terminology specific to the HVAC-R trade to help technicians prepare for problems they will encounter on the job. The entire range of mathematics problems used in the field are covered - from whole numbers, fractions, ratio and proportion, to percentages, measures, formulas, and trigonometry. Useful practice opportunities in the book also help readers learn to write up estimates and bills. Heating,Air conditioning,Sự nóng lên,Điều hòa không khí Mathematics,Mathematics,Toán học,Toán học Trọng Hải Trung tâm Học liệu Trường Đại học Cần Thơ