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International System of Units (SI). ► Measurement = # and unit  Ex: Miss. Pitre ran 10 km ► Base unit of length is the metre (m) ► “ “ “ mass is the.

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Presentation on theme: "International System of Units (SI). ► Measurement = # and unit  Ex: Miss. Pitre ran 10 km ► Base unit of length is the metre (m) ► “ “ “ mass is the."— Presentation transcript:

1 International System of Units (SI)

2 ► Measurement = # and unit  Ex: Miss. Pitre ran 10 km ► Base unit of length is the metre (m) ► “ “ “ mass is the gram (g) ► “ “ “ volume the litre (L) SI Handout SI Handout

3 Prefixes ► Part of word found before base unit  m = milli  multiply base unit by 1000  c = centi  “ “ “ “ 100  d = deci  “ “ “ “ 10  da = deca  divide base unit by 10  h = hecto  “ “ “ “ 100  k = kilo  “ “ “ “ 1000

4 Do the following m = _____ km g = _____ cg L = _____ daL m = _____ mm

5 Multiplication trick ► When multiplying by 10, 100, 1000…  Add as many zeros to the # as 10, 100, has ► Ex: 356 x 1000 =  Move the decimal to the right by the # of zeros in 10, 100, 1000… ► Ex: x 100 = ► Do these:  3746 x 100 =  x =

6 Division trick ► When dividing by 10, 100, 1000…  Take away as many zeros to the # as 10, 100, 1000… has ► Ex: ÷ 10 =  Move the decimal to the left by the # of zeros in 10, 100, 1000… ► Ex: ÷ = ► Try these:  ÷ 100 =  ÷ =

7 Multiplying/Dividing by Decimals ► Multiplying by 0.1 is like dividing by 10 ► “ “ 0.01 “ “ “ “ 100 ► “ “ “ “ “ “ 1000 ► Dividing by 0.1 is like multiplying by 10 ► “ “ 0.01 “ “ “ “ 100 ► “ “ “ “ “ “ 1000

8 x 0.01 = ÷ = x 0.1 = ÷ 0.1 =


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