5个回答
展开全部
=16.8一4十2.86
=12.8十2.86
=15.66
=12.8十2.86
=15.66
展开全部
=16.8一0.4十2.86
=16.4十2.86
=19.26
=16.4十2.86
=19.26
追答
=16.8一4十2.86
=12.8十2.86
=15.6
15.66
展开全部
16.8-2.8÷0.7+2.86=16.8-4+2.86
=12.8+2.86
=15.66
=12.8+2.86
=15.66
展开全部
15.66
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