套用介紹
心算技巧Amazeanddelightothersasyoumultiply,divide,andsquareatlightningfastspeed.Learnandpracticethetricksofmentalmathcalculationinafunandengagingapplication.Studyanyofthemathtricksandthenpracticethemasyouprogressthroughvariouslevelsofproficiency.Teaseyourbrainwithaquickpracticesessionwhilewaitinginlines,ridinginthecar,orontheplane.Onlythebasicmathskillsofaddition,subtractionandsimplemultiplicationanddivisionareneededtoachieveastonishingresults.
Students:Baffleyourmathteachersbyprovidinganswersfasterthanthoughtpossible.
Teachers:Inspireyourstudentsasyoupullanswerstomathproblemsoutofthinair.
Masterthesemathtricks:
*Multiplyashighas20x20
*Squareanumberendingin5
*Squareanytwodigitnumber
*Doublingandhalving
*Multiplyanynumberby4
*Multiplyanynumberby5
*Multiplyanynumberby9
*Multiplyanynumberby25
*Multiplyanynumberby99
*Squaresfrom41to59
*Roundnumbermultiplication
*Divideanynumberby5
*Multiplyby11
*Multiplyinthe90‘s
*Squarenumbersinthe50‘s
*Multiplydifferingby2,4,6
*Multiplyif1‘ssumis10
*Multiplytwoclosenumbers
*Sumoffirstnevennumbers
*Sumoffirstnoddnumbers
*Ninescomplement
*Tenscomplement
*Largenumberaddition#1
*Largenumberaddition#2
*Largenumbersubtraction
*Evenlydivisibleby3
*Evenlydivisibleby4
*Evenlydivisibleby5
*Evenlydivisibleby6
*Evenlydivisibleby7
*Evenlydivisibleby8
*Evenlydivisibleby9
*Evenlydivisibleby10
*Evenlydivisibleby11
*Evenlydivisibleby12
*Squarenumbersinthe20’s
*Squarenumbersinthe30’s
*Squarenumbersinthe60’s
*Squarenumbersinthe70’s
*Squarenumbersinthe80’s
*Squarenumbersinthe100’s
*Squarenumbersinthe200’s
*Squarenumbersinthe300’s
*Squarenumbersinthe400’s
*Squarenumbersinthe500’s
*Squarenumbersinthe700’s
*Squarenumbersinthe800’s
*Squarenumbersinthe900’s
*CastingOutNinesDigitSum
*CheckAdditionbyCastingNines
*CheckSubtractionbyCastingNines
*CheckMultiplicationbyCastingNines
*CheckDivisionbyCastingNines
*CastingOutElevensDigitSum
*CheckAdditionbyCastingElevens
*CheckSubtractionbyCastingElevens
*CheckMultiplicationbyCastingElevens
*CheckDivisionbyCastingElevens
PrepareforthemathsectionontheSAT,PSAT,ACT,GRE,GMAT,MCAT,oranyotherstandardizedtest.Don‘twastetimewithacalculatoronthefewteststhatallowthem.UseMathemagicsasatutortoquickenupyourtesttakingabilities.
PerfecttrainingfortheUILMathematicsandNumberSenseContests.
Activateandchallengeyourbraintoexpanditsabilitytothinkefficientlyandhavefunatthesametime.Trainyourselftobreakproblemsdownintosmallermoremanageablepiecesinordertoreachsolutionsquickerandmoreaccuratelythananyoneelse.
