算一算
﹣
= 
+
= 1﹣
= 
++= 
﹣
﹣
=
340+602= 280+420= 427﹣327= 500﹣306= 482﹣62=
50×3= 25×4= 125×8= 206×5= 400×8=
算一算﹣= += 1﹣= ++= ﹣﹣=
340+602= 280+420= 427﹣327= 500﹣306= 482﹣62=
50×3= 25×4= 125×8= 206×5= 400×8=
×2= 6×
=
×
=
×1=
×
=
+
=
×
=
﹣
=
×
×
×
．
=
×
=
×
=
×
=
=
×
=
=
×6=
×
=
×
= 24×
=
×1= 0×
=
×1000= 44×
小时的
是多少小时？
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