4.83×100-4.83×2+9.66=483-9.66+9.66=483
4.83×(100-2)+9.66=483-9.66+9.66=483
4.83×98+9.66
=4.83×(100-2)+9.66 ...............拆数
=4.83×100-4.83×2+9.66 .........乘法的分配律展开
=483-9.66+9.66
=483