小明读一本600页的故事书，3天读了45页，照这样的速度，还要几天才能读完这本书？（用比例解）
直接写出得数﹣=﹣=﹣=+=+=﹣=+=﹣=
直接写出得数．+=﹣=+=﹣= 10﹣﹣=====．
直接写得数===== 1﹣= 1﹣==
直接写出得数.+= 1﹣=﹣= 2.5×3.8×4=+= 10﹣9.12=+0.25= 0.65×9+0.65=
计算下面各题，能简算的要简算． ．
﹣
=
﹣
=
﹣
=
+
=
+
=
﹣
=
+
=
﹣
+
=
﹣
=
+
=
﹣
=
﹣
=
=
=
=
=．
=
=
=
=
= 1﹣
= 1﹣
=
=
+
= 1﹣
=
﹣
= 2.5×3.8×4=
+
= 10﹣9.12=
+0.25= 0.65×9+0.65=
．
粤公网安备 44130202000953号