4/5-0.4(计算)
问题描述:
4/5-0.4(计算)
答
4/5-0.4
=4/5-4/10
=4/5-2/5
=2/5【或0.4】
4/5-0.4(计算)
4/5-0.4
=4/5-4/10
=4/5-2/5
=2/5【或0.4】