用简便方法计算．125×43×8 36×99 41×23+36×41+41×41 28×98+56．
×= ．
直接写出下面各题的得数． 1﹣= 32÷8= 51÷7= 300×4= 9÷= 24÷5= 70×90= 560+350=+= 52÷6= 180×0= 5600﹣3000=
．
×2=×1=×= 12×= 0.9×=×7=×= 5﹣=×= 9×=
3个与3的计算结果相同，它们的意义也相同． ．
×
．
= 32÷8= 51÷7=
= 24÷5=
+
=
．
×2=
×1=
×
= 12×
=
×7=
×
= 5﹣
=
×
= 9×
=
与3的
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