1. MAP4C Unit 2
Measurement in Design

2. You should be able to convert from Imperial measures to Metric measures.
Many trade materials are still measured using the Imperial systems – like lumber for example.
Some conversions may require the use of fractions to solve.
Conversions

3. When adding or subtracting fractions, we must use a common denominator.
So ½ and ¾ has a common denominator of 4, as 2 and 4 both go into 4.
If we added ½ and ¾, we would add 2/4 + 3/4 = 5/4 = 1 and ¼.
Fractions

4. If we multiply fractions, you simply multiply the numerators and the denominators separately.
5/4(3/5) = 15/20 = ¾
If we divide fractions, we must invert and multiply the fractions.
5/4 ÷ 6/7 = 5/4 x 7/6 = 35/24
Fractions

5. Convert Convert 8 feet to inches.
There are 12 inches in a foot, so there are 8feet(12 inches/foot) = 96 inches in 8 feet.
Note feet are represented by an apostrophe and inches as a quote.
8’ = 96”
Convert 5000 m into km
There are 1000 m in a km, so 5000 m = 5000m/1000m/km = 5 km.
Convert

6. Text work Prepare: page 169 #1-4, page 171 #1, 2