用递等式计算，能简算的要简算．
135÷27+12×4 1620﹣1320÷60+80 （85+14×5）÷5
520÷[13×（43﹣33）] 490÷[210÷（360÷12）] [160﹣（75+38）]×107
45+61+39+55 25×5×4×2 125×（8×5）×7．
相关试题
用递等式计算，能简算的要简算．
135÷27+12×4 1620﹣1320÷60+80 （85+14×5）÷5
520÷[13×（43﹣33）] 490÷[210÷（360÷12）] [160﹣（75+38）]×107
45+61+39+55 25×5×4×2 125×（8×5）×7．
= 
×30= 
÷
= 16×
÷
÷4= 
÷
×1= 
÷
×
=
÷3= 
÷6= 
÷3= 
÷
．
= 
= 
= 
= 
=
= 
= 
= 
= 
=
×3= 6÷
= 
÷1=
÷
÷
= 0.5÷
=
﹣
=
= 
÷6= 
÷
= 1.6÷0.7= 1÷3×
=
÷
÷
= 
÷
= 
×
÷
﹣
= 
+
= 24×
= 36÷
=
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