Summary

These notes cover topics in math, including complex fractions, adding and subtracting fractions and decimals, percentages, converting decimals to fractions and vice versa. The notes include examples and practice problems.

Full Transcript

**Complex Fractions - A fraction whose numerator and denominator or both numerator and denominator contain fractions.** STEPS IN SIMPLIFYING COMPLEX FRACTIONS STEPS IN ADDING OR SUBTRACTING UNLIKE DENOMINATOR **Step 1: First [ solve] it separately.** **Step 2: Find the [Least Common Denominator...

**Complex Fractions - A fraction whose numerator and denominator or both numerator and denominator contain fractions.** STEPS IN SIMPLIFYING COMPLEX FRACTIONS STEPS IN ADDING OR SUBTRACTING UNLIKE DENOMINATOR **Step 1: First [ solve] it separately.** **Step 2: Find the [Least Common Denominator or LCD of the given] denominator of that fraction.** **Step 3: Once you have the LCD, think [ of a number that if you multiply by the given fraction the answer will be equal to your LCD.]** **Step 4: [ADD or SUBTRACT] once they have the same denominator.** **STEP 5: Proceed to [make a division sentence.]** **Step 6: [Keep, Change, Flip]** **Step 7: [Reduce your answer to the lowest term] if necessary.** STEPS IN ADDING OR SUBTRACTING THE SAME DENOMINATORS **Step 1: First [solve] it separately.** **Step 2: Copy the [Denominator of the given] fraction , then [ADD or Subtract] it directly.** **STEP 3: Proceed to [make a division sentence.]** **Step 4: [Keep, Change, Flip]** **Step 5: [Reduce you answer to lowest term] if necessary.** [\$\\frac{\\left( \\frac{\\mathbf{1}\^{}}{\\mathbf{2}} \\right)\^{\\mathbf{2}}}{\\mathbf{4}}\\mathbf{\\ \\ = \\ }\\frac{\\frac{\\mathbf{1}}{\\mathbf{2}}\\mathbf{\\ \\times}\\frac{\\mathbf{1}}{\\mathbf{2}}}{\\mathbf{4}}\$]{.math.inline} **=** [\$\\frac{\\frac{\\mathbf{1}}{\\mathbf{4}}}{\\mathbf{4}}\\mathbf{\\ =}\\frac{\\mathbf{1}}{\\mathbf{4}}\\mathbf{\\ \\div}\\frac{\\mathbf{4}}{\\mathbf{1}}\\mathbf{\\ =}\\frac{\\mathbf{1}}{\\mathbf{4}}\\mathbf{\\ \\times}\\frac{\\mathbf{1}}{\\mathbf{4}}\\mathbf{\\ =}\\frac{\\mathbf{1}}{\\mathbf{16}}\$]{.math.inline} A **decimal number** can be defined as a number whose [whole number part and the fractional part is separated by a decimal point.] The dot in a decimal number is called a decimal point.![](media/image2.png) [     ⇒]{.math.inline} ![](media/image4.png) Note: Always remember when reading the decimal part read it as a number number and attach the place value of the last digit. For example: **Forty** ![](media/image6.png) Seven and eight thousand three hundred forty - six ten thousandths. FOR EXAMPLE: **23. 046** - Round to the nearest thousandths ANSWER: 23.046 **123. 4582** - Round to the nearest ten thousandths ANSWER: 123. 4587 **100. 57896** - Round to the nearest hundred thousandths ANSWER: 100.57896 **236. 32405673**- Round to the nearest hundred millionths ANSWER: 236.32405679 **532. 2567348936** - Round to the nearest ten billionths ANSWER: 532. 2567348936 **[CONVERTING FRACTIONS TO DECIMALS ]** - The fraction bar separating the "part"and the "whole" represents division. This means that all fractions can be converted into decimals by dividing the [numerator] by the [denominator.] ![](media/image8.png) **[CONVERTING DECIMALS TO FRACTIONS]** - To convert decimals to fractions, we take note of the place value of the digits. **Steps for Conversion:** - - - - **Example:** Convert 0.5 into a fraction. **Solution:** Let\'s apply the steps that we learned. Step 1: Identify the place value of the last digit. 0.5 \

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