甲班有男生25人，女生比男生少2人，女生有27人． ．
直接写出得数．﹣=+=+=+= 1﹣=﹣= 3+=﹣= 3﹣1=+=+=+3=
．
直接写出得数．﹣= 0.7﹣0.62= 12÷25== 10=+×0= 13×= 10=
直接写得数．+=+= 1﹣=﹣=﹣=+=﹣1=﹣= 3﹣1=+=
做下面分数的加减法，结果能约分的要约分．+=+=﹣=
﹣
=
+
=
+
=
+
=
=
﹣
= 3+
=
﹣
=
+
+
=
+3
=
．
﹣
= 0.7﹣0.62= 12÷25=
=
=
+
×0= 13
×
= 10
=
+
+
= 1﹣
=
﹣
=
﹣
=
+
=
﹣1=
﹣
=
=
+
=
+
=
+
=
﹣
=
粤公网安备 44130202000953号