L1 Numeracy Workbook Answers - Skills Workshop, 2011 Page 12
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32L1 Numeracy work book
N1/L1.11 Solve problems involving algebra
Name_____________________
1) Substitute the value given in each problem then work out the answer:
a) W=Width, L=Length
Calculate the perimeter
Perimeter = (Wx2) + (Lx2) Answer = 12m
3.5 m
2.5m
b) Use the equation to calculate the area:
2
Area = W x L: Answer = 9m
4 m
2.25m
2) Gross profit = sales ‐ food cost
a) Sales = £25 food cost = £15 gross profit = £10
b) Sales = £ 57 food cost = £ 31 gross profit = £26
3) My monthly mobile phone charges are calculated using the following formula:
Cost = £15 + £0.20 x minutes used
How much will it cost for:
i)
30 minutes used =£21.00
ii)
70 minutes used =£29.00
iii)
140 minutes used =£43.00
October 2011. Answers kindly contributed by Kevin Melling and Judith White, Somerset Skills & Learning. Workbook written and contributed
by Simon Kelsey, Steps to Work. September 2011. Search for Simon, Kevin and Judith on
Adult Numeracy and Functional Maths. For related resources visit the download page for this resource at skillsworkshop
Page 12 of 32
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