数学里Z是不是要打一点？（我初一） 帮我z做一下初一数学
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2 2 4 6 8 10 12
3 3 6 9 12 15 18
4 4 8 12 16 20 24
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6 6 12 18 24 30 36
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不是的 老师手写是为了方便区分z和2
打点事为了区分Z和2的区别 一般情况下都是打的
便于与2分开可以打也可以不打。
你是说中间写一杠是吧，很多人都是这么写，并不是什么规定，只是为了防止z和2混起来，毕竟手写的很像
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