怎样算简便就怎样算．7480﹣107×45 13.74﹣（1.87×2+1.89）×+÷6 ÷[（﹣）÷]．
直接写得数．+0.625= 24×= ÷9=（+）×12= 12×25%= ÷=
直接写出得数= = 3.14×8= =1﹣40%= = = 52=
口算．+= ×4= ÷= ×=15÷= ÷8= 0÷= ﹣=
直接写得数．﹣= ÷12= 15×= 36÷= += ×12=÷= ×= ××16= 1÷÷= ÷2÷= ×9÷×9=
直接写出下面各题得数．+= ×= 36×25%= 27÷3%= ÷10=52﹣32= ÷= 3﹣= ÷16= ×+×=
×
+
÷6 
÷[（
﹣
）÷
]．
+0.625= 24×
= 
÷9=
+
）×12= 12×25%= 
÷
=
= 
= 3.14×8= 
=
= 
= 52=
+
= 
×4= 
÷
×
=
= 
÷8= 0÷
= 
﹣
=
﹣
= 
÷12= 15×
= 36÷
= 
+
= 
÷
= 
×
= 
×
×16= 1÷
÷
÷2÷
= 
×9÷
+
= 
×
= 36×25%= 27÷3%= 
÷10=
÷
= 3﹣
= 
÷16= 
×
+
×
=
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