用短除法求72和90的最大公因数．
直接写出得数．×6= 0×=×10=×=×4=×=+= 0.25×=×= a×=﹣=+=××3=××=
根据算式涂一涂，根据涂得内容写出答案×=×=
直接写得数．+=+0.625=×=÷7= 0.28+4.52= 9.1÷1.3= 9×÷9×= 3.2÷4= 4÷0.01×0.1= 18÷9=
直接写出得数．+== 8.7﹣4.8= 1.25×2.4= 9.3：0.03= 38÷4== 1÷=
直接写出得数 8÷0.2= 2﹣1=×1= 1÷7+=+= 1.02﹣0.43=÷25%×=×2÷×2=
×6= 0×
=
×10=
×
=
×4=
+
= 0.25×
=
×
= a×
﹣
=
+
×
×3=
×
×
=
×
=
×
+
=
+0.625=
×
=
÷7= 0.28+4.52=
÷9×
÷9=
+
=
= 8.7﹣4.8= 1.25×2.4=
= 1÷
=
=
×1
= 1÷7+
+
= 1.02﹣0.43=
÷25%×
=
×2÷
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