用竖式计算.0.86×1.6= ； 25.8×4.7= ； 40.9×2.6= ；82.4×2.8= ； 0.45×10.8= ； 0.37×2.9= ．
直接写得数．×3= 5÷=÷=×2= 100×29%= 0.625×0.4=÷=+=×（+）=×÷=
2========
小马虎把一个数除以错写成乘，得到的结果是15．正确的计算结果应该是多少呢？
1÷=﹣= 100×=×27= 5÷=×=÷12=×4=÷=
直接写得数．×= 1÷= 4﹣=÷= 8÷=×0= 2×=÷8=
×3= 5÷
=
÷
×2= 100×29%= 0.625×0.4=
÷
=
+
=
×（
+
÷
=
=
=
=
=
=
=
=
=
错写成乘
=
﹣
= 100×
=
×27= 5÷
=
×
=
÷12=
×4=
÷
=
×
= 1÷
= 4﹣
=
÷
= 8÷
=
×0= 2×
=
÷8=
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