直接写出得数．×1.2= 1÷2= 1.8÷= ×÷×=（+﹣）×12= 3﹣÷0.75= 24÷8= 4÷﹣÷4=
计算下面各题．+﹣+++﹣﹣（+）
﹣=+=﹣=﹣=+=﹣= 1﹣=﹣=﹣=+=
+++．
递等式计算+=+=﹣=﹣= 1﹣=+﹣= 1﹣+．
直接写出得数．===== 1﹣=
×1.2= 1÷2
= 1.8÷
= 
×
÷
+
﹣
）×12= 3﹣
÷0.75= 24
÷8= 4÷
﹣
÷4=
+
﹣
+
+
+
﹣
﹣（
+
）
﹣
=
+
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﹣
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﹣
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=
﹣
= 1﹣
=
﹣
﹣
=
+
=
+
+
+
．
+
=
+
=
﹣
﹣
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= 1﹣
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