On a 10-meter-long bamboo pole, starting from one end, mark a red dot every 1 meter (both ends are not recorded). How many red dots should be recorded on this bamboo pole?
在一根10米长的竹竿上，从一端开始，每隔1米记上一个红点(两端都不记)．这根竹竿上共要记多少个红点．
<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<result>9</result>