计算:
3060÷15﹣2.5×36 ()×60
÷9+
×
x﹣x=
42:
=x:
.
递等式计算.
743﹣450÷18×2588××(1÷
﹣1)
519.2÷(24.3×2﹣4.6)126×98+126+63×2.
直接写出计算结果:﹣
= ;
+0.75= ;(
+
)×4= ;1÷
﹣
÷1= 2
;
÷6= ;5﹣1
﹣1.6= ; 7×
÷7×
= ;0.9+99×0.9= ;
= ; 1200﹣798= ;
﹣
+
= ;12.5×0.16×8= .
计算下列各题,能简算的要简算.×
﹣
÷5
÷(
+
)×
.
直接写出得数.﹣
=57÷19=0.5÷0.05=125×3×8=10÷10%=
÷
=2×
=5.38﹣(1.5+2.38)=
×4÷
×4=400÷25÷4=