直接写出得数529+198= 305﹣199= 2.05×4= 8×12.5%= +×0= =
．
直接写出得数 ①= ②= ③= ④1﹣= ⑤= ⑥= ⑦= ⑧1﹣= ⑨6﹣（）= ⑩=
计算．．
直接写得数．﹣= 1﹣=+=﹣=+=+7= 4﹣=﹣0.9=﹣=+=﹣1=++=
口算下面各题．+=﹣=+=﹣= 6.4+2.3= 7.3﹣0.4= 1.1+2.8= 707÷7= 360÷3= 93÷3= 40×25= 720÷4= 80﹣25= 36×0=
+
×0= 
=
．
= ②
= ③
= ④1﹣
= ⑤
=
= ⑦
= ⑧1﹣
= ⑨6﹣（
）= ⑩
=
．
﹣
= 1﹣
=
+
=
﹣
=
+
=
+7=
=
﹣0.9=
﹣
=
+
=
﹣1=
+
+
=
+
=
﹣
=
+
=
﹣
= 6.4+2.3= 7.3﹣0.4=
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