Math Word Problems Demystified - A Self Teaching Guide
TYPE III: FINDING THE BASE In type III problems, you are given the part and rate and are asked to find the base or whole. EXAMPL ...
of the increase or decrease is used as the part. For example, suppose a calculator sold for $40 last week and is on sale for $30 ...
Try These In a local hospital, there are 80 nurses. If 15% of them are males, how many of the nurses are males? Sean weighed 17 ...
3. P¼RB P¼90% 110 ¼0.90 110 ¼ 99 4. B¼ P R B¼ $ 29 : 70 6 % ¼ $ 29 : 70 0 : 06 ¼$ 495 5. P¼RB P¼18% 50 ¼0.18 50 ¼9; 50 9 ...
LESSON 6 Solving Word Problems Using Proportions In order to solve word problems using proportions, it is necessary to understan ...
Aproportionis a statement of equality of two rations. For example,^35 ¼ 159 is a proportion. A proportion consists of four terms ...
SOLUTION: GOAL: You are being asked to determine how far the plane can travel in 5 hours. STRATEGY: Write the ratio: The ratio s ...
EXAMPLE:If a carpet sells for $15.50 per square yard, how much will it cost to cover a room that measures 20 square yards? SOLUT ...
IMPLEMENTATION: Solve the proportion. 4 gallons 1120 sq:ft: ¼ 7 gallons xsq:ft: 1120 7 ¼ 4 x 7840 ¼ 4 x 7840 4 ¼ 41 x 41 1960 ...
IMPLEMENTATION: 2 50 ¼ 7 : 5 x 50 7 : 5 ¼ 2 x 375 ¼ 2 x 375 2 ¼ 21 x 21 187 :5 miles ¼x The cities are 187.5 miles apart. EVAL ...
If a person earns $3250 in 3 months, how much will the person earn in 12 months? On a map, the scale is 3 inches¼240 miles. How ...
3 : 3 chapters 10 days ¼ 15 chapters xdays 10 15 ¼ 3 x 150 ¼ 3 x 150 3 ¼ 31 x 31 50 days¼x 4 : 12 yards 3 costumes ¼ xyards 10 ...
7 : 3in: 240 miles ¼ 8in: x 240 8 ¼ 3 x 1920 ¼ 3 x 1920 3 ¼ 31 x 31 640 miles¼x 8 : 2 gal: 420 sq:ft: ¼ x 1050 sq:ft: 420 x¼ 2 ...
7 LESSON Solving Word Problems Using Formulas In mathematics and science, many problems can be solved by using a formula. Aformu ...
EXAMPLE:Find the interest on a loan whose principal (P) is $4800 at a rate of 5% for 6 years. UseI¼PRT. SOLUTION: GOAL: You are ...
EVALUATION: You can estimate the answer by subtracting 30 8 from the Fahrenheit temperature and dividing the answer by 2: 86 30 ...
Find the Celsius temperature (C) when the Fahrenheit temperature (F) is 50 8. Use C¼^59 (F 328 ). Find the volume (V) of a cyl ...
P¼ 2 lþ 2 w ¼ 2 20 þ 2 8 ¼ 40 þ 16 ¼56 in. C¼ 5 9 ðF 32 Þ ¼ 5 9 ð 50 32 Þ ¼ 5 9 18 ¼ 108 V¼3.14r^2 h ¼3.14 32 ...
9. I¼ E R ¼ 18 6 ¼3 amperes F¼ 9 5 Cþ 32 ¼ 9 5 50 þ 32 ¼ 90 þ 32 ¼ 1228 LESSON 7 Using Formulas 65 ...
Quiz 2 Find the sales tax on a book that costs $25 if the rate is 6%. (a) $15 (b) $0.15 (c) $150 (d) $1.50 If a person earned $ ...
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