/Tag: Numeration
3 07, 2018

Scientific Notation

By |2018-12-02T16:17:01+10:00July 3rd, 2018|Tags: , , |0 Comments

Scientific Notation Go to the Scientific Notation Forum to see more questions or ask your own Formulas used in Scientific Notation Scientific Notation, also known as standard notation, is used to write very large or very small numbers. The decimal always goes after the first number and it is [...]

20 07, 2017

Appropriate Number of Significant Figures

By |2017-07-21T10:08:03+10:00July 20th, 2017|Tags: , , |0 Comments

Appropriate Number of Significant Figures When adding or subtracting: least number of decimal places When multiplying: least number of significant figures   worked examples Add 12.323 + 13.9 + 0.34 correct to the appropriate number of figures.  12.323 + 13.9 + 0.34 = 26.563 add the numbers = [...]

11 07, 2017

Significant Figures

By |2017-07-12T15:52:19+10:00July 11th, 2017|Tags: , |0 Comments

Significant Figures Non-zero numbers are always significant Any zeros between numbers are significant in decimal numbers, the zeros before the numbers are not significant, but the zeros between or after numbers are   worked examples Round 758 correct to 2 significant figures.   760 since we only want [...]

20 11, 2016

Improper Fractions

By |2016-11-20T13:15:54+10:00November 20th, 2016|Tags: , , , |Comments Off on Improper Fractions

Improper Fractions when the numerator (top) is bigger than the denominator (bottom) worked examples Change $$1\frac{2}{3}$$ to an improper fraction. $$=\frac{5}{3}$$ we have 1 whole which means 3 thirds the easiest way to think about this is the denominator (3) times the whole number (1) and then add the [...]

20 11, 2016

Mixed Numerals

By |2016-11-20T12:21:46+10:00November 20th, 2016|Tags: , , , |Comments Off on Mixed Numerals

Mixed Numerals worked examples Change $$\frac{10}{7}$$ to a mixed numeral. $$=1\frac{3}{10}$$ we need to find out how many 7's go into 10, which is 1 and there will be 3 left over so the 1 is the whole number and the 3 that is the remainder goes into [...]

17 11, 2016

Scientific Notation

By |2017-07-11T09:14:19+10:00November 17th, 2016|Tags: , |0 Comments

Scientific Notation Scientific Notation, also known as standard notation, is used to write very large or very small numbers. The decimal always goes after the first number and it is always multiplied by 10 to the power. worked examples Write 300 in scientific notation.   300 = 3 × [...]

16 10, 2016

Recurring Decimals

By |2016-11-07T18:57:18+10:00October 16th, 2016|Tags: , , , |Comments Off on Recurring Decimals

Recurring Decimals Convert $$0.\dot1$$ to a fraction in simplest form.  let x = 0.11111111... start with a 'let statement' let any letter, we are going to use x, be the number in expanded form, remembering that the dot above the 1 means that the 1 is repeating and [...]

30 07, 2016

Multiplying Fractions

By |2016-11-20T11:28:02+10:00July 30th, 2016|Tags: , , , |Comments Off on Multiplying Fractions

Multiplying Fractions worked examples $$\frac{7}{11}\times\frac{11}{5}\times\frac{10}{14}$$ $$=\frac{7}{\cancel{11}}\times\frac{\cancel{11}}{5}\times\frac{10}{14}$$ cancel the 11's $$=\frac{7}{5}\times\frac{10}{14}$$ this leaves us with just the 7 and 10 in the numerators (top) and 5 and 14 in the denominators (bottom) $$=\frac{\cancel{7}1}{\cancel{5}1}\times\frac{\cancel{10}2}{\cancel{14}2}$$ look at the 7 and 14: divide both by 7 so the 7 will cancel to [...]

20 07, 2016

Adding & Subtracting Fractions

By |2016-10-21T13:17:00+10:00July 20th, 2016|Tags: , , , , |Comments Off on Adding & Subtracting Fractions

Adding & Subtracting Fractions worked examples  1/2  + 1/3 = $$=\frac12^{\times3}_{\times3}+\frac13^{\times2}_{\times2}$$ find the lowest common denominator for 3 and 2. Consider the times tables for both 3 and 2 and then find lowest number that is in both 2: 2, 4, 6, 8, 10, 12, 14, 16... 3: 3, 6, 9, [...]

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