甲、乙两人同时从山脚开始爬山，到达山顶后就立即下山．他们两人下山的速度都是各自上山速度的2倍．甲到山顶时，乙距山顶还有400米，甲回到山脚时，乙刚好下到半山腰．求从山顶到山脚的距离．
相关试题
÷62.5%=
÷8= 1.8÷
= 0.375+
﹣0.01=
×
÷
=
×
÷
= 0.125×
×8= 6.4×﹙1
﹣1.25﹚=
直接写得数
36+48= 920﹣460= 570÷10= 12.5÷0.5=
4﹣2.4= 0.125×8= 3.6×25%=
×
=
3.5+4.7= 0.23÷0.1=
÷3=÷
=
直接写得数．
1÷
=
×
=
+
= 2﹣
=
4.2×0.5= 0.25×0.6= 246+198=
﹣
=
=
=
= 84.6+4=
= 10÷0.5=
= 603×39≈
4980÷51≈ 9.3÷0.03=
÷2÷= 9﹣
﹣
．
吨的大小．
=
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