把下面各比化成后项是100的比。(1)宁宁的邮票张数与丽丽的邮票张数比为2:5；(2)东东做对的题数与做错的题数比为100:125。
直接写得数： 12÷=×30=÷= 16×=÷=÷4=÷×1=÷×=÷3=÷6=÷3=÷．
直接写数：==========
直接写得数．×3= 6÷=÷1= 1÷÷=÷= 0.5÷=﹣= 0÷×=
直接写数： 7×=÷6=÷= 1.6÷0.7= 1÷3×=÷=÷=×0.15=÷=×÷×=
直接写出得数﹣=+= 24×= 36÷= 0.27÷0.56= 0.125×8= 0.63÷9= 0.32=
=
×30=
÷
= 16×
÷
÷4=
÷
×1=
÷
×
=
÷3=
÷6=
÷3=
÷
．
=
=
=
=
=
=
=
=
=
=
×3= 6÷
=
÷1=
÷
÷
= 0.5÷
=
﹣
=
=
÷6=
÷
= 1.6÷0.7= 1÷3×
=
÷
÷
=
÷
=
×
÷
﹣
=
+
= 24×
= 36÷
=
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