By Brian Speed, Keith Gordon, Kevin Evans
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Extra info for 2tier-foundation for Edexcel A
Converting mixed numbers Key the mixed number 2–34 into your calculator. The display will look like this. qxd 13/03/06 14:17 Page 35 CHAPTER 2: FRACTIONS –4–. This represents the top-heavy fraction 11 Write down the result. 2 11 3 = 4 4 • Now key at least ten more mixed numbers and convert them to top-heavy –– or 17 32 –11– . fractions. Keep your numbers sensible. For example, don’t use 8 16 19 • Write down your results. • Look at your results. Can you see a way of converting a mixed number to a top-heavy fraction without using a calculator?
If –100 m means one hundred metres below sea level, then +100 m means one hundred metres …… sea level. If +3 h means three hours after midday, then …… means three hours before midday. If +5 h means 5 hours after midday, then …… means 5 hours before midday. If –6 h means six hours before midday, then +6 h means six hours …… midday. qxd 14/03/06 14:29 Page 53 CHAPTER 3: NEGATIVE NUMBERS If +2 °C means two degrees above freezing point, then …… means two degrees below freezing point. If +8 °C means 8 °C above freezing point, then …… means 8 °C below freezing point.
1–. Each small square is called a twenty-fourth or 24 Cut one of the rectangles into quarters, another into sixths, another into thirds and the remaining one into eighths. 1 4 1 4 1 4 You can see that the strip equal to a quarter takes up 6 squares, so: 1 4 6 1 = 4 24 This is another example of equivalent fractions. 1 6 1 6 1 6 1 6 1 6 1 6 This idea is used to add fractions together. qxd 13/03/06 14:17 Page 30 CHAPTER 2: FRACTIONS EXERCISE 2C Use the strips to write down each of these fractions as twenty-fourths.
2tier-foundation for Edexcel A by Brian Speed, Keith Gordon, Kevin Evans