7的乘法口诀拼图个数1234567块数212835424914717×=7一七 得 七1摆1条小鱼要用几个三角形?27×=14二 七 ...
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7的乘法口诀7每次加7,把得数填在空格里。142128354249内容解析1×7=72×7=143×7=214×7=285×7=356×7=42...
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