直接写得数+= ﹣= ×= ×=×÷×= += ×0+3= 3+1.75=÷= （+）×=
= = == = == =
直接写出得数．= = 1﹣= +0.625== = 3﹣= +0.75=
口算：+= 1.52= ﹣= 1.8÷2.7=﹣= += 4+= 3﹣=﹣= ﹣= ﹣﹣= ++=
（1）+= （2）﹣= ．
直接写出得数．= = = == = = =
+
= 
﹣
= 
×
= 
×
=
×
÷
= 
= 
×0+3= 3
+1.75=
÷
= （
+
）×
=
= 
= 
=
= 
= 
=
= 
=
= 
= 1﹣
= 
+0.625=
= 
= 3﹣
= 
+0.75=
+
﹣
= 1.8÷2.7=
﹣
= 
+
= 4+
= 3﹣
=
﹣
= 
﹣
= 
﹣
﹣
= 
+
+
=
+
= 
﹣
= ．
= 
= 
= 
=
= 
= 
= 
=
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