35×62的积是 位数,40×25的积的末尾有 个0.
15÷ =0.6= %= :20= 折.
20%= ÷40= <填小数>=× = 成.
== ÷ = (最简分数)
3﹕ ==0•375=6÷ = %
=0.4=12: =6: = %.