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Chapter 1

Addition of Fractions Same denominator fractions Add numerators and write sum over denominator. When adding fractions with different denominator: Make the denominator the same by finding LCD. Then whatever you do to the top do to the bottom. Add, then simplify fraction.
Subtraction of Fractions Same denominator fractions subtract numerators, write sum over denominator.Subtracting different denominator fractions: find LCD what is done to the numerator is done to the denominator.Subtract numerators, denominators stay the same. Simplify if needed.
Multiplication of Fractions Fractions with no mixed numbers: multiply across NxN, DxD then simplify to lowest terms. Mixed number fractions: change mixed numbers into improper fractions. Whole number x denominator+original numerator = [?] /denominator. Then multiply NxN/DxD=fraction
Division of Fractions Dividing fractions, inverse the second fraction and multiply. Write as an improper fraction then reduce to lowest form.
Fractions to Decimals Numerator - Denominator = Decimal
Reading Decimals 0.2 is read as two tenths (2/10) , 0.02 is read as two hundredths (2/100) 0.002 is read as two thousandths (2/1000)
Rounding of Decimals Round off the decimal and drop the final number. Ex: 4.624 becomes 4.62 * Exception: if the final number is 5 or more, drop it and then increase the adjacent number by 1. Ex: 2.36 becomes 2.4.
Adding Decimals
Subtracting Decimals
Multiplying Decimals
Dividing Decimals
Fraction Converted to Percent
Ratio Converted to Percent
Decimal Converted to Percent
Solving Ratios and Portions
Ratios and Proportions in Dosage
Created by: ysaenz7