四则混合运算及运用学过的远算解决解的实际问题
第1个回答 2019-05-29
15×0.25+2.5×8.5
=1.5×2.5+2.5×8.5
=(1.5+8.5)×2.5
=10×2.5
=25本回答被网友采纳
=1.5×2.5+2.5×8.5
=(1.5+8.5)×2.5
=10×2.5
=25本回答被网友采纳
第2个回答 2019-05-29
15×0.25+2.5×8.5
=1.5×2.5+2.5×8.5
=2.5×(1.5+8.5)
=2.5×10
=25
=1.5×2.5+2.5×8.5
=2.5×(1.5+8.5)
=2.5×10
=25