Study GuideBasic Math and Pre-Algebra–Word Problems1. Key WordsWhen you solve word problems, certainkey wordsgive you clues about which math operation touse. Learning to spot these words makes problem-solving much easier.1.1AddiƟon Key WordsThese words usually mean you need toaddnumbers together:•Addition–“The team needed the addition of three new players.”•Sum–“Find the sum of 5, 6, and 8.”•Total–“What is the total of the last two games?”•Plus–“Three chairs plus five chairs.”•Increase–“Her pay was increased by $30.”If something is being combined or made bigger, you are probably adding.1.2SubtracƟon Key WordsThese words suggest you shouldsubtract:•Difference–“What is the difference between 8 and 5?”•Fewer–“There were ten fewer girls than boys.”•Remainder–“What is the remainder when…?”•Less–“A number is six less than another number.”•Reduced–“His allowance was reduced by $5.”•Decreased–“What number decreased by 7 is 5?”•Minus–“Seven minus a number is…”Preview Mode
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