如题所述
第1个回答 2020-04-08
0.368x78+2.2x3.68=0.368x(78+22)=0.368x100=3.68
这道题得关键是将2.2x10x3.68/10=2.2x3.68
这道题得关键是将2.2x10x3.68/10=2.2x3.68
第2个回答 2020-04-08
0.368×78+2.2×3.68
=3.68×7.8+2.2×3.68
=(7.8+2.2)×3.68
=10x3.68
=36.8
=3.68×7.8+2.2×3.68
=(7.8+2.2)×3.68
=10x3.68
=36.8
