用竖式计算 128×7= 380×4= 604×6= 596÷2= 812÷4= 692÷5=
直接写出得数 ﹣=+=+=+0.3=﹣= 1﹣=﹣= 3÷9=
计算下列各题，能简算的要简算，并把主要的计算过程写出来．+﹣=﹣﹣=++= 25×0.25×3.2= 6﹣（﹣）=﹣++=
直接写得数．+=+=﹣= 1﹣=﹣= 0.25+=+= 2+=+=﹣=
脱式计算，能简算的要简算． 3﹣﹣++﹣+﹣．
①+=②+=③﹣= ④2﹣=⑤+=⑥+=
﹣
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+
+
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+
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= 2+
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﹣
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﹣
+
+
﹣
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﹣
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=③
﹣
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=⑤
+
=⑥
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