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Canyoudothemath:Whatisonehundredtimesfour,dividedbythesquarerootofahundred?Howcanyouworkitoutquickly?Theanswerisforty.Yearsago,threescientistsatTexasInstruments,JerryMerryman,JamesVanTasselandJa
更新时间:2024-03-29 15:54:33
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问题描述:

Canyoudothemath:Whatisonehundredtimesfour,dividedbythesquarerootofahundred?Howcanyouworkitoutquickly?

Theanswerisforty.Yearsago,threescientistsatTexasInstruments,JerryMerryman,JamesVanTasselandJackKilby,inventedthehandheldelectroniccalculator.Theirfirstdevicecouldadd,subtract,multiplyanddivideanditwassmallandeasytotake.

Yetafterfortyyears,calculatorsintheclassroomstilladduptothesameolddebateGenerallycalculatorsareconsideredtobeuseful——especiallywithmorecomplexmath.Somemathteachersateverylevelsupporttheuseofcalculatorsandstudentsareevenpermittedtousethemwhentheytakecollegeentrancetests.Butitisalsothoughtthatyoungstudentsshouldknowbasiccalculationbeforetheybeginusingthem.

Someeducationexpertsthinkcalculatorsareusedtoomuch.Children,theysay,learntodependontheseelectronicbrainsinsteadoftheirown.Calculatorsmaynotonlygivestudentsanswerstoquestionstheydonotreallyunderstand,theymayalsokeepthemfromdiscoveringideasforthemselves.

Otherexperts,though,saycalculatorshavehelpedmakemathematicsmoreunderstandabletomorestudents.Theysaycalculatorsgivestudentsmoretimetounderstandandsolveproblems,andtodevelopabettersenseofwhatnumbersmean.Thatway,thereasoninggoes,theycanfeelbetterabouttheirabilities.

1.Whichofthefollowingcalculationagreeswiththequestionraisedinthe1stparagraph?

A. B. C. D.

2.ThreescientistsatTexasInstrumentsinvented

A.thefirstelectroniccalculator B.thecalculatorhandle

C.theportableelectroniccalculator D.thefirstcalculator

3.Wecaninferfromthepassagethat inthepast.

A.mathteacherssupportedusingcalculatorseverywhere.

B.studentswerenotallowedtousecalculatorintests.

C.usingcalculatorsinclassroomswasunderargument.

D.youngstudentshadtoknowhowtousecalculators.

4.Accordingtoexperts,calculatorsbenefitstudentsinmanywaysEXCEPT

A.providingthemwithanswerstothequestions

B.stoppingt

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