行驶路程一定，车轮的周长与转数成反比例，所以车轮的半径与转数不成比例． ．
计算下列各题，能简算的要简算．．
直接写得数．+= 43×200= 1﹣= 350+50= 630÷7= 15×6÷9=+= 45﹣9×5=
直接写出得数﹣=﹣=+=+= 1﹣﹣=+=﹣=+=
直接写得数．﹣=+=+= 1﹣﹣=﹣=+= 1﹣=﹣+=
直接写出计算结果．======= 1 = 1﹣=
．
+
= 43×200= 1﹣
= 350+50=
+
= 45﹣9×5=
﹣
=
﹣
=
+
=
+
﹣
=
=
﹣
=
+
=
﹣
=
+
=
+
= 1﹣
﹣
=
﹣
=
+
= 1﹣
=
﹣
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=
=
=
=
=
=
=
= 1 
= 1﹣
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