列竖式计算24+57= 80﹣24= 7×6= 94﹣49+21=35÷5= 43÷5= 90﹣23﹣45= 66÷9=
直接写得数；+=+= 1﹣=+=+=+=+=﹣=
计算：= ．
= ．
5﹣4= ．
+
=
+
= 1﹣
=
+
=
+
+
=
+
﹣
=
= ．
= ．
= ．
﹣4= ．
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