2019年沪教版四年级上册数学教案：《线段、射线、直线》

2019-09-11 18:13:00来源：网络

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【秋季班】一年级课程｜二年级课程｜三年级课程｜四年级课程
【秋季班】五年级课程｜六年级课程｜初一课程

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" 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KWs7hIVvxcL4CGEVuLm58fy/mbu+vh7kRno36k+X54jC+AhhI3d7extOTk5KN4OCzs/Pw9nZWelmMAG+FQvjIoSN2P39fTg5OTGe00wZXJU+bC9rv7y8lG4KzJ4QNlLbG7AFsHlyszx92h5fdj3iChiOEDZC2zF+XDKYp+fnZ8NG0Lvtw94NYQHlCGEjsx3bxwCa87R9CLftzxC2Q1jocYUyhLAReXl5MYL5jMU8hBtyc+8hlCOEjcT2HiCPGZmny8vLpIdwQ26+hQvDE8JGYLPZhNVq5R6gmTo7OzMQL6OwHY/OHwMwDCGssM1mE05OTrI8B5C65HgIN+R2f38flsulISxgAEJYYR8/fnRT7Axtv4AhfDNGhrCAYQhhBa3Xaw/WnaHtECTu/2PMtkNYuE0C+iOEFXJxcREuLi5KN4OB9fkQbsjNoMHQLyGsgMvLSzdiz9BQD+GGnLZDWFxdXZVuCkyOEDawm5ubsF6vSzeDgfn6P7X79OmTfRgyE8IGdHt7G05OTko3gwEZCJMpub6+DicnJ4awgEyEsIHc3987eM2M+2mYotvb27BcLl1WhwyEsAF4IPf8eAg3U/b4+Bg+fPhgCAvoSAjr2dPTk78aZ8ZDuJkDQ1hAd0JYj7YDcjoZz4eHcDMn20vut7e3pZsCVRLCevL6+qo3ZJTuwuliERY/fo4+fwvh2+dw+vlb5zl7CDdztH302j//+U9jH0IiIawH278OjYg+Mt8+h6Nt8Pr5q6M/wlgH6/Xa2G/M1s3NTfjzn/8c/vGPf5RuClRFCMtss9mE4+Pj8PDwULop/OJb+Hy0CIvTux0vfQ5Hu34fYfsQbo+fYq7Oz8/Der0Om80mXF1d+RY4JBDCMtp2y3so8wjdnYbF4ihkuOr4k4dwM2f7xsC7vb11XyREEsIy8kDu8fp+2TFfCHt8fAzL5dIlZ2bp0Bh4viEMcYSwTM7OzsL19XXpZrDH9xB2GtpddPzV9iHcLy8vGeYGdXl6eooaA287Vp4/VGA/ISyDi4sL3woau0yXIz2Emzl7eHgIy+Uyuofr9fU1LJdLQ1jAHkJYR1dXV+HTp0+lm8FBP4am2HkD/l04jbgx3wOMmbObm5tWf4Bs75V1pQB+J4R1cHNzE9brdelmEOvudMdwFHfh9MBlyu0NyFdXV323EEbp8vLy5zcg2zo7O/MHK7wjhLV0f38fjo+PSzeDVD/GClv8/GkOYB7CzZxtNpusY+BdXV0Z0BjemHQIe35+7uW5Zvf398bCmYH//ve/4a9//atn41G5H2PkLd79HH0OTbdI9jUGnkd7wR8mHcL66MV4fHx0AJmJ//3vf2G5XOoFYxK+fT56c0/kj3skG4LYZrPp7Q+Qr1+/Jt3gD1M16RAWwv4BBdt4enoKy+VSAJuRnPsPlPRrCMs/dl6q7VAXhrBgziYfwrbOz887fbNtOzq6v9zmqev+A6W9D2F9PEUi1XYIC0+dYK5mE8JCaD/G0+vrq9GfMUYYVUu9HDmU7fN2DWHBHM0qhIXwx2jnKYMNrlYrXeaEENL3HxiL75cf478ZPLSzs7Ns38KEWswuhIUQ/9y/7V9oDw8PwzSMKnhuJDX67XLkCF1eXhrCglmZZQgLIYSXl5fGx2lsR3l2rwK7HNp/YGxqCGEhfB/CwmV/5mK2ISyEP4LWrpHQ1+t19vFxmJam/QfGppYQFkL6MyqhVrMOYVvvnwl4dnbmJlGieaYk4/Z+sNZx3Qu2z3ZIIJf9mTIh7IftN9/+9a9/hYuLi9LNoTLb/ce9LJDP9rK/20KYKiHsjf/7v/8LHz9+/P6Pu9NQSc89I3F/f290fchs+wUpt4cwRULYTj+670cwhg4AIeuDxGEshLBdvn0Op0dlH+kBwK8uLy/Der122Z/JEMJ2uDs9Cp+//egNc00SYDRubm4MYcFkCGG/uQunP4JX6QfcAvC7h4cHT65gEoSwd759PnpzQ/7356sdSWEAo+LJFUyBEPaLHw+1/e2njnF1AObk5eUlrFYrQ1hQLSHsrbvT33u97k7DYrEwXAXACL2+voaTkxNDWFAlIeynu3C6s8drO9q03jCAMdpsNmG9Xhtom+oIYSGEXx/r8WvYujt1WRKgBhcXF4awoCpCGACTcXNz88eTT2DkhDAAJsUYYtRCCAMAKEAIAwAoQAgDAChACAMAKEAIAwAoQAgDAChACAMAKEAIAwAoYPYhbLGYfQlaqb1utbe/lLnXbe7r35a6daN+7dRQt/G3sEc1bKAxq7V+tbZ7LOZav7mudy7q1466dTP2+o27dT0a+4apRW11rK29YzW3Os5tffuijmnUK48x13G8LevZmDdKTWqrY23tHau51XFu69sXdUyjXnmMuY7jbVmPxrxBalRLPWtpZy3mUs+5rOdQ1DOOOuU11nqOs1U9G+vGqFUt9aylnbWYSz3nsp5DUc846pTXWOs5zlb1bKwbo1a11LOWdtZiLvWcy3oORT3jqFNeY63nOFvVs7FujFrVUs9a2lmLudRzLus5FPWMo055jbWe42xVz8a6MWpVSz1raWct5lLPuaznUNQzjjrlNdZ6jrNVPRvrxqhVLfWspZ21mEs957KeQ1HPOOqU11jrOc5WDWCsG6Q2tdWxtvaO1dzqOLf17Ys6plGvPMZcx/G2rGdj3ig1qa2OtbV3rOZWx7mtb1/UMY165THmOo63ZQMY84apQa31q7XdYzHX+s11vXNRv3bUrZux12/crRvA2DfQWNVet9rbX8rc6zb39W9L3bpRv3ZqqNv4WwgAMEFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCWAuLRXPZ9r1+6H1j8L6NOdYldb1L16/rcpreX3If6LLsUu2u4TMD0FaVR7jFYvHz5/3v902362ffvGOW3+b1mPel/PQlJoilBI22gS1m+779/7Y/MeuWax869FrOfaDNdhhbgMwdyIf4/ADEqvJI1PVE0TZEpS6/zyBVMoT1cfLfN92+UFaiJy52ui4hLKfU8Hxomtx/RKSE3bfT56iTEAaMQZVHotQTWeoB/O20qSeS3H+5H2rj0NqcxGPfE3PybRNe+5g+ZR+MDY9dw1/MNLn3/761DfSp8wUoocojUZdLEX0uv+lkmzsI9HESadOTsWs9u/SENK1rjjCX2u6m9hxq765/vw84se/rsvzU1w8ZMsDEBtgu8wUopcojUcrJu4+/5He9L6b3JnWZOXpNUrSZZ0xw6DP8tl1+myB96H1N+8D76dq2PVfA6jLdmP4AyPkZBhhalUeiQyFo33SHeihi5rHvdynLSdG2NyRVXwEsZd6HTrJjDmExbUrdP3e9P2W5Ke1sCjZ99UbFGssfHAC5VXkkiu0hSglhKdOl9FCl9mQcml/b+aQuM7XnIUevXWzIOhQYuvSg7Np/UuezL9zsm3/T+se81rTMmHrFLCslCHapf0xbchDCgDGo8kiUEsJyBIq24S2mDSn2ncyH0naZOUNYrnmkhLDU9sT2JKXuV33VInaaIfe5nJ+bffMHKK3KI1FKCGt6X9uTTWzYajPvfe9J6TXJLbXnom1PyKHpuvbipPyuy/Y7FML2haqYdqZs95whbMjwf2h/E8KAqajySDTGEBb7+9iTWR9hLnZ5qT8x845tQ9PvYkNSl3Yf2j45Qti++eTaP5um69r+lOW3EfP5iP3sxCwHoKQqj0QpIazLiXjf71MP4LFBIkewiX1/iq7zyxnC2pxgu2yvlNfeTrOvxysmoOVqQ473DvVHwK7ltgn+OWsI0Lcqj0Qle8JSTsJt2tAlsLxfdi5DhrCmE25KO7oG5jYBfV/t24SwrnKEsCFDTMrnQAgDpqLKI1HXEBZzSajNyTsmNOS6tFPyBNnX+1MDzKF5pwbSmG3Tpu45QkOKLvtGjv0/9aePdYhdT4CSqjwS7TuAx4Ss99M2/S71JBKzvC4H/6F7KFLanOMkvOv/24SwXfM9dGKODYBdQnPM+ncNMV3+sOi6/+fU1zL7bjdAiskcidqeQIY8GOdY1tAnj5L1aQpY77df7Pbssv3HfuIeKpwPYUrrArCPoxkAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQljlFouym7D08gGgVtWdQReLReufKSx/V3sOta9PfS9/3/tz1L3N+3Ntf+EVAGeCyh06uZcIYbmWfyhAtf1dzGsp07QliAHMW29ngSF7Y+amqadliBA2xPIPvW8KIWyI+QMwXr2cAVJPhl3mH3P5J/eJrvTy97VlX3v61NfyxxzCcm5/IQxgviYRwlL+fwrLfzvfkpcj+1p+bDhqcy9Wm+U0/S7H9hfEAOZpkKP/1EJQ6eW/ne+uXpehesL6Wn6OcBQzr7YhTggDIIdej/59hYAul4NSelC6zm/X9LlrsO+/+5adY/27LD9l3VKnaRPCui47x/YXwgDmSU/YhJYf8+8all9bCEv5/9h2ADB9gx39c55oxhqChlr+vrZs/93Ug1XD8mODUJsevEPLEcIAGIoQVmj5ffdQlZBr+SV7wmKWL4QBkEMvR/++Q0fue3JKLT9HT1XM5b+he+JyLL9NcCkVwrrsfwIYwHwNEsL2XbLKNf/c0w+5/Da1aDrBD9EbOMTy+w5hXXqncm9/AOaptzNA0z05Qli++cWe4IcKYTmXnxqgcoawru/tYz4ATEuVZ4GmS0CHLg3VvvymUNv3epdYfttgtf3/rpdHU9c3tg4CGACzOBOUPuGVXv6U5AhQbZY5ZM8tAPPg7AAAUIAQBgBQgBAGAFCAEAYAUIAQBgBQgBAGAFCAEAYAUIAQBgBQgBAGAFCAEAYAUIAQBgBQgBAGAFCAEAYAUIAQBgBQgBAGAFCAEHbAYrG7RPt+P3Q7ShqyTTmW1XYeXZZ96L1Nrx/a98a4TwAQb7JH8VwnqBpD2GKxaPWTuuxdv2+77C5hJdbQISzmfV3rHlO3mPoCMLxJH5n7PHGPOYTlmOf71/YFriG0DW675pNz2YfqFzNtm/0rdj1itiEA5VR9VO7a09BlGSVCWK4w8naeKa+VOKl3rf++XqPYfaft8mNr1aa36+3lyH1tbOqlBGAcqjwip4SPKYWwNu9pCmt9hbD3AeJQcDx0WTOmbTHrkdL+Nu/bNY/369GmHvveG7P8Q78DoJyqj8htL8vkWEYtISzl36nLS+3FadsrldqDtW/aLoEutdexbU9YTC9n2148IQxgXKo+Ik85hDX1mKT0hqT8O/a1Q9PkDmHbad72CMVoG4TeL/P9cmPqH7ut2myDXD1jAJRV9VF5jCEsNjwdOkl3CUH7Xs8ZwmLfG7O+MWEmtl1N0+1b/33tjZ1nzPZrsx/tW05qoBLAAMap6iNzqRCW2iOTa7mp04wlhKX8//bf+4JNTBhJCTYpUoPPvn8fCpVdt+uu6YUwgPGp+sjcdwjbF7aEsH5DWMry2gajmN63Nr2YqT2dbYJmm9oJYQDjU/WReagQtu//+w5hKSf/2Hm8f73pvfumSwloXUNY03rm2K5DvS8lyOcOVkIYwDhVfWTO0VsU+95DvWJjlKMnrCkkxISj2N6jXfPoEgT3SX1fl967t9P1HSTHvB8CsFvVR+4+Q1jsSbOvk1/syT9XyNz1WkwvTduenDbTd+2B7NquXD2CsfNIuZTZtjcRgHKqPDLHXpbLHVD6WE7s8ofuFeqy/n2GsFIBLOV3u36fMl3KPh0TTIUwgHGa7JF5qADWdVltlp8r9KS8L7XXJ/Wnab5dw1euHrA2gWvfe5vmGXN5NvY1AMbLkfudtpfXcp0E28yn7/f0vf6pvUEx88sdTPq47DuW9gFQhiM3AEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAPN140QAAAGQSURBVEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGMkWi8XPHwCgHWdRkrwPXoIYALTjDEq0fYFLEAOAdM6eRBPCACAfZ0+iCWEAkI+zJyGEEHWjvRAGAPk4exJCEMIAYGjOnkQTwgAgH2dPoglhAJCPsydJjBMGAHk4g5LMiPkA0J2zKABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAFCGABAAUIYAEABQhgAQAH/D9WjY+LoaG+vAAAAAElFTkSuQmCC" 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