89.3×43+893×5.7=89.3×(43+57)=89.3x100=8930
=89.3×43+89.3×57=89.3×(43+57)=89.3×100=8930
89.3×43+893×5.7=893×4.3+893×5.7=893×(4.3+5.7)=893×10=8930
参考