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onetwothreefourfivesixseveneightninethirteenfourteenfifteensixteenseventeeneighteennineteenteneleventeen十几twelvethirtyfortyfiftysixtyseventytwentyeightyninetyty几十numbers两位数的读法twenty-onetwenty-twothirty-onethirty-twofourty-onefourty-two个位十几几十oneelevententwotwelvetwentythreethirteenthirtyfourfourteenfortyfivefifteenfiftysixsixteensixtysevenseventeenseventyeighteighteeneightyninenineteenninety十几十几，-teen,-teen,-teen几十几十，-ty,-ty,-tyonetwothreefourfivesixseveneightnineteneleventwelvethirteenfourteenfifteensixteenseventeentwentyeighteennineteentwenty-onetwenty-twotwenty-threetwenty-fourtwenty-fivetwenty-sixtwenty-seventwenty-eighttwenty-ninethirtythirty-oneWhatiseightplustwo?It’sten.Whatiseightplusthree?It’seleven.+=?+=?Whatisfiftyplusone?It’s_____.Whatisseventeenplusthree?It’s_______.51twentyWhatisthirtyminusfive?It’s.Whatisnineteenminusthree?It’s.-=?2516Whatisfortyminusfour?It’s.Whatiseightyminusfifteen?It’s.3665coinscolabananaappleicecream70p90p80p95pHowmuchisthecola?It’s70p.Howmuchisthebanana?It’s90p.Howmuchistheapple?It’s80p.Howmuchistheicecream?It’s95p.Howmuchisthebook?It’s100p.Goodbye!