如题所述
第1个回答 2020-11-07
0.7×98
=0.7×(100-2)
=0.7×100-0.7×2
=70-1.4
=68.6
=0.7×(100-2)
=0.7×100-0.7×2
=70-1.4
=68.6
第2个回答 2020-11-07
0.7×98
=0.7×(100-2)
=0.7×100-0.7×2
=70-1.4
=68.6
=0.7×(100-2)
=0.7×100-0.7×2
=70-1.4
=68.6