一节火车车厢可以装63吨货物，要运945吨货物，需要几节车厢？
直接写出得数﹣= 2÷= 0.23×100= 51×=13×（2+）= +÷5= 6÷（﹣）= ：=．
直接写出得数0.25= 1.6+4= == 8÷0.2= == = =25×4×0×125=
直接写出得数．+= ﹣= ×2= ×= 54﹣54×0=×= ÷4= ÷= ÷42= 0÷25+2.5=×= ×14= ÷4= +÷+=
直接写出得数．3﹣2= 1÷= 321﹣178+257=0.875÷= 409×10﹣409= 2.25+7=（+）×18= 3+2.7+2+1.3=
口算、心算我最强+ × 8.4÷0.7 470﹣72﹣28 5÷﹣ +÷+ ×× ×25% 698﹣299．
﹣
= 2÷
= 0.23×100= 51×
=
）= 
+
÷5= 6÷（
）= ：
=
= 1.6+4= 
=
= 8÷0.2= 
=
= 
= 
=
+
= 
﹣
= 
×2= 
×
= 54﹣54×0=
×
= 
÷4= 
= 
÷42= 0÷25+2.5=
×
= 
×14= 
÷4= 
+
+
= 1÷
= 321﹣178+257=
= 409×10﹣409= 2.25+7
+
+2.7+2
+1.3=
+
×
8.4÷0.7 470﹣72﹣28 5÷
+
×
×
×25% 698﹣299．
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