育英小学给灾区捐书，一共捐出768本，每8本装一包，每4包装一箱．一共可以装几箱？
1﹣= ．
1+3= ．
= ．
口算 55+37= 80﹣26= 1400﹣800= 2+210= 9+300= 82+0= 1﹣= += ﹣= ．
口算我最棒.+= += ﹣= ﹣=+= 1+= ﹣0.2= +0.3=+= 1﹣+= ﹣﹣= ++=
= ．
+3= ．
= ．
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﹣
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﹣0.2= 
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