一共有15颗白菜，一天吃掉了4颗，还剩下多少颗白菜？
直接写出得数． 6×=== 100×25%=====（比值）==
直接写出得数．= 100×0.1%= 3.2×== 1.75+0.25====
直接写出得数： 0.25×4= 1.8×=﹣7.8﹣2.2= 2.4÷= 4.2+0.85= 7×= 3.1﹣=÷6=（+）×12=
直接写出得数．×= 7÷=﹣= 0.64+3.6= 1÷×9=×+×=×÷×=+= 101×﹣= 6.5﹣0.72﹣28%=
直接写出得数． 10﹣4.5=×26= 0.04×25=÷= 15÷=×÷×=﹣=+= 6÷=×= 0×= 3÷=
=
=
= 100×25%=
=
=
=
=（比值）
=
=
= 100×0.1%=
=
=
=
=
=
=
﹣7.8﹣2.2= 2.4÷
= 4.2+0.85=
= 3.1﹣
=
÷6=（
+
）×12=
×
= 7÷
=
﹣
= 0.64+3.6=
×9=
×
+
×
=
×
÷
+
=
﹣
= 6.5﹣0.72﹣28%=
×26= 0.04×25=
÷
=
=
×
÷
×
=
﹣
=
+
=
=
×
= 0×
= 3÷
=
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