3.8乘99加0.38怎样简算?急
问题描述:
3.8乘99加0.38怎样简算?急
答
3.8x99+0.38
=3.8x(100-1)+0.38
=380-3.8+0.38
=380-(3.8-0.38)
=380-3.42
=376.58