巧记数字口诀one,two,three,一,二,三;four,five,six记心间。七八九是seven,eight,nine;ten,eleven,twelve很...
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11乘的乘法有:11X11=121 11X12=132 11X13=143 11X14=154 11X15=165 11X16=176 11X17=18711X18=1...
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