第1个回答 2016-05-19
=(77+25)+(2.7+2.8)
=102+5.5
=107.5
第2个回答 2016-05-19
77+2.7+2.8+25
=77+5.5+23+2
=(77+23)+(5.5+2)
=100+7.5
=107.5本回答被提问者采纳
第3个回答 2020-05-06
77+2.7+2.8+25
=(77+2.7)+(25+2.8)
=79.7+27.8
=107.5
第4个回答 2020-06-04
77+2.7+2.8+25
=(77+25)+(2.7+2.8)
=102+5.5
=107.5