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①78+21-24=
②35+29+15=
③100-26-58=
④19+28+35=
⑤53-36+75=
⑥66+27-55=
6+64﹦ 18+26﹦ 48-18= 30-9=
30+48﹦ 73-20﹦ 51-36﹦ 28+34﹦
55+20+3﹦ 42-(26+4)=
①52+46=
②80-51=
③45+18+19=
④79-28-25=
⑤50+36-8=
⑥27+(60-47)=
①43+36=
②93-45=
③27+63=
④45+17-36=
⑤80-34-26=
⑥56+(33-29)=
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