78加168加25就行啦😭
78+168+25
＝80+170+30-2-2-5
＝80+200-9
＝280-9
＝271
＝75+25+3+168
＝100+171
＝271
78+168+25
=(75+3)+168+25
=75+25+168+3
=100+168+3
=268+3
=271
78+168+25
=78+(122+46)+25
=78+122+(46+25)
=78+122+(45+25+1)
=78+122+71
=200+71
=271
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