【文档说明】清华版英语三年级上册《unit 3 let's do math lesson 18》PPT课件(共15页).ppt，共(15)页，823.500 KB，由小喜鸽上传

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十位数和个位数之间须用连字符“-”连接eg.21twenty-one54fifty-four63sixty-three78seventy-eight36thirty-six99ninety-ninetwenty-onetwenty-twotw

enty-fourtwenty-fivetwenty-seventwenty-nine¥11¥29Ihad40Yuan.Iboughtahatandscarf.Thehatwas11Yuan.Thescarfwas29Yuan.Howmuchmoneyisleft?40-11=29,29-29=0

Fortyminuselevenistwenty-nine.Twenty-nineminustwenty-nineiszero.ZeroYuanisleft.¥15¥26Ihad45Yuan.Iboughtahatandscarf.Thehatwas15Yuan.Thescarfw

as26Yuan.Howmuchmoneyisleft?45-15=30,30-26=4Forty-fiveminusfifteenisthirtyThirtyminustwenty-sixisfour.FourYuanisleft.¥17¥36

Ihad60Yuan.Iboughtahatandscarf.Thehatwas17Yuan.Thescarfwas36Yuan.Howmuchmoneyisleft?60-17=43,43-36=7Sixtyminusseventeenisfor

ty-three.Forty-threeminusthirty-sixisseven.SevenYuanisleft.¥21¥49Ihad85Yuan.Iboughtahatandscarf.Thehatwas21Yuan.Thescarfwas49Yuan.Howmuc

hmoneyisleft?85-21=64,64-49=15Eighty-fiveminustwenty-oneissixty-four.Sixty-fourminusforty-nineisfifteen.FifteenYuanisleft.¥16¥23Ihad50Yuan.Ibough

tahatandscarf.Thehatwas16Yuan.Thescarfwas23Yuan.Howmuchmoneyisleft?50-16=34,34-23=11Fiftyminussixteenisthirty-f

our.Thirty-fourminustwenty-threeiseleven.ElevenYuanisleft.回家用英文从一数到一百，数给爸爸妈妈听吧！