计算下列各题．（能简算的要简算）．
91÷2.6÷0.05= 6.3×3.7+6.3×6.3= （3.7+1.7×0.4）÷2.5=
7.28+3.2÷2.5= 0.74+0.9×7.4= 7.8÷0.125÷0.8=
相关试题
= 4×
= 10÷
= 72÷36%=
=
=
÷
+5%=
×25%=
+15%=
×
=
÷
=
×
=
÷
=
=（3）
=（4）15×0.4=
=（6）
=（7）
=（8）
=口算：
3.14×2= 3.14×3= 3.14×4= 3.14×5= 3.14×6=
3.14×7= 3.14×8= 3.14×9= 3.14×2.7=
+
=
4+
= 2﹣
=
×
= 6÷
=
÷5=
×
=
﹣
= 3.14×2+3.14×0.7= + = ．
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