5.76+3.4= 4.28﹣1.308= 17×38= 513+19= 1073÷25=307×25=
20×××××14×××．
直接写出得数：×2= 6×=×=×1=×=+=×=﹣=
计算下面各题．×××．
直接写出得数． 35×=×=×=×= 24×=×=×= 0×=×6=×=×= 24×=
×1= 0×=×1000= 44×=
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×
×
×14×
×
×
．
×2= 6×
=
×
=
×1=
×
=
+
=
×
=
﹣
=
×
×
×
．
=
×
=
×
=
×
=
=
×
=
=
×6=
×
=
×
= 24×
=
×1= 0×
=
×1000= 44×