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

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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!

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

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%

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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