简便计算 13.4﹣（3.4+0.33） 0.75××．
口算．+=﹣=+=﹣=+=+=﹣= 2﹣= 1﹣﹣=
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=+=
×
．
+
=
﹣
=
+
﹣
=
+
+
=
﹣
= 2﹣
= 1﹣
=
﹣
=
+
=
+
=
+
=
=
﹣
= 3+
=
﹣
=
+
+
=
+3
=
．
﹣
= 0.7﹣0.62= 12÷25=
=
=
+
×0= 13
×
= 10
=
+
+
= 1﹣
=
﹣
=
﹣
=
+
=
﹣1=
﹣
=
=
+
=
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