1. 2B Temperature, 2C Scientific Notation, 2E Rounding Numbers
Unit 8: Number and algebra
2B, 2C, 2E
2/23/ :51 AM

2. Why do we use units of measure? Why not just state a value?
When stating answers or expressing the results of a mathematical process, IB requires you to supply units of measure (or use the appropriate symbols) to denote distance, angle measure, area, volume, currency, temperature, or time.
Who has designed our current, common units of measure?
2B, 2C, 2E
2/23/ :51 AM

3. Imperial Units and Metric System
imperial established in 1824 in England metric common measures compared to the base unit kilo 1000 times k centi one hundredth c milli one thousandth m 2.5 km = 2500 m = cm = mm kg = 3.98 g = 398 cg = 3980 mg Which of the values’ representations might be considered the “best” form? Why do we use standard form (i.e.: scientific notation)?
2B, 2C, 2E
2/23/ :51 AM

4. Temperature
to convert from ºC to ºF: ºF to ºC: Convert 75ºF to ºC. Why do we round?
2B, 2C, 2E
2/23/ :51 AM

5. Scientific Notation
Copy
writing a number in the form where and do not write down the number using “E” (calculator speak)
2B, 2C, 2E
2/23/ :51 AM

6. Significant Figures
Copy
IB usually allows or expects you to round to three significant figures (“3 s.f.”), but may request more or less significant figures in a question can use scientific notation as an intermediate step zeros that precede and follow the first and last non-zero digits are not significant figures
2B, 2C, 2E
2/23/ :51 AM

7. Guided Practice
p. 41: start assignment Read and follow all instructions. List the page and problem numbers alongside your work and answers in your notes. Use the back of the book to check your answers.
2B, 2C, 2E
2/23/ :51 AM