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Warm up Notes Preliminary Activity Activit y For Fun Add xtranormal link here Basic Arithmetic

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There are no notes today because you should all be able to do basic arithmetic!

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Back Questions 1. 7.84 + 15.9 - 6.275 2. 45.2 x 17.9 62.8 3. 784 8.2 x 7.6 4. Find 7 / 8 of 2154 5. Change 15 / 32 to a decimal 6. 38 2 - 1263 7. 939.6 ÷ 29 8. (-16.4 ) x 24.5 9. (-10.7) x (-4.9) 10. (-28) x (-6.4) ÷ (-15.2) Answers 17.465 12.883439 12.580231 1884.75 0.46875 181 32.4 -401.8 52.43 -11.789473

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Back Questions 1. Use the reciprical button on your calculator to find the value of: a ) 1 / 8 b ) 1 / 2.64 c ) 1 / (45 + 23) 2. Calculate the following percentages a) 9% of $120 b) 85% of $28 000 c) 102½% of $18.20 d) Increase $48 by 12% e) Increase $130 by 24% f) Decrease $46.50 by 20% 3. Convert these fractions to a percentage to one decimal place a) 5 / 12 b ) 9 / 16 c ) 318 / 420 0.125 0.3787878.... 0.0147058 $10.80 $23 800 $18.66 $53.76 $161.20 $37.20 41.7% 56.3% 75.7%

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Back 4. Mr Thompson invests $2400 in a government savings loan offering 11.5% interest per year. How much interest does he earn in 4 years? 5. A jewellery store advertised an end of season sale, where all goods were offered at a discount of 15%. How much would a diamond ring be sold for if it was originally marked at $1 290? 6. A manufacturer produces an article for a cost of $146. At what price must he sell it to make a gross profit of 45%? 7. A book costing $3.48 is sold for $5.25. Express the profit as a percentage of the cost price. 8. A manufacturer makes an article at a cost of $187.50. He lists it for sale at 60% above cost price and allows a trade discount of 30% off the list price and a cash discount of 2½% off the reduced price. What profit does he make per article if both discounts are given? 9. The annual interest on a loan of $4 500 is $382.50. What is the interest rate charged on the loan? $1 104 $1 096.50 $211.70 50.9% $17.25 8.5%

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