2 Pre-requisite Skills: ONE IN DISGUISE: any number over itself (divided by itself) Ex:Equivalent Fractions: Multiply by a ONE IN DISGUISE Ex.Reduce / Simplify Fractions: Divide by a ONE IN DISGUISE Ex:Mixed and Improper Fractions: Mixed: Improper:
3 You multiply straight across! BASEBALL SCENARIO: You’re SAFE when …To Multiply Mixed Numbers,Whole Numbers and Fractions:* NOTE!You multiply straight across!Turn all mixed or whole numbers into improper fractions.Multiply straight across!Simplify answer (mix and reduce).You can cancel in the problem or after!
4 Turn all mixed or whole numbers into improper fractions. To Divide Mixed numbers,Whole Numbers and Fractions:Turn all mixed or whole numbers into improper fractions.Flip the 2nd fraction (RECIPROCAL).Multiply (see multiplication notes)
5 SONG! When you add and subtract . . . LINE ‘EM UP! Add and Subtract Fractions and Mixed Numbers (WITHOUT BORROWING)SONG!When you add and subtract LINE ‘EM UP!You must have a CD (common denominator) – make them using equivalent fractions.Add or subtract the numerators.Keep the same denominator.Simplify answer (mix and reduce).
6 BORROWING from Whole Numbers Note! You can’t take somethin’ from nothin’So what do you do?Rename the whole number to show a fraction.(Borrow a ONE and disguise it!)
7 Subtract with BORROWING! There are three methods of borrowing a ONE and including it in an existing fraction.BIG 1 Add ONE IN DISGUISE