1.25加2.5括号乘以0.8用简算方便
第1个回答 2017-09-12
如图
第2个回答 2017-09-12
(1.25+2.5)×0.8
=1.25×0.8+2.5×0.8
=1+2
=3
乘法结合律计算本回答被网友采纳
=1.25×0.8+2.5×0.8
=1+2
=3
乘法结合律计算本回答被网友采纳
第3个回答 2017-09-12
(1.25+2.5)x.8
=1.25x0.8+2.5x0.8
=1+2
=3
=1.25x0.8+2.5x0.8
=1+2
=3
第4个回答 2017-09-12
(1.25+2.5)×0.8
=1.25×0.8+2.5×0.4×2
=1+2
=3
=1.25×0.8+2.5×0.4×2
=1+2
=3