爸爸的身高是1.7米，比小强高0.3米，小强的身高是多少米？
直接写得数．×= ÷= 1﹣=0.13= （+）×8= ﹣=+= ×= 0÷=÷3×÷3=
用递等式计算．．
直接写出得数+= 1÷= ×= ÷9=（﹣0.5）÷= ÷= ×= ÷10=﹣= ÷×=
口算：+= 3﹣2= 1÷1= 7×÷7×=5÷5= ×1.2= ×1= （+）×20=
直接写得数．4÷40%= ×= 20×5.5= （+）×4=﹣= 2.9+3.4= 0.1÷0.01= 6﹣﹣=÷3= 6×= ÷= 1÷﹣÷1=
×
= 
÷
= 1﹣
=
+
）×8= 
﹣
=
+
= 
×
= 0÷
=
÷3×
．
+
= 1÷
= 
×
= 
÷9=
﹣0.5）÷
= 
÷
= 
×
= 
÷10=
﹣
= 
÷
×
=
+
= 3﹣2
= 1
÷1= 7×
÷5= 
×1.2= 
×1
= （
+
）×20=
×
= 20×5.5= （
+
）×4=
﹣
= 2.9+3.4= 0.1÷0.01= 6﹣
﹣
=
÷3= 6×
= 
÷
= 1÷
﹣
÷1=
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