细心算．（1）用竖式计算，并验算．120.1﹣92.05= 25.675+3.326=（2）用小数计算．10吨﹣9吨10千克 ﹣+．
请选择合适的方法计算下面各题． 1﹣﹣﹣+++﹣﹣+﹣．
直接写出得数： ①= ②= ③= ④= ⑤= ⑥= ⑦= ⑧=
直接写得数．+=+=+=﹣=+= 0.4+=﹣=﹣=+=+=
直接写出得数．= 5﹣== 0.5×0.5÷5==﹣== 0.4×25﹣10==﹣= 1+==
直接写出得数：+=﹣= 0.2+1.8= 0.9﹣0.27= 1.9×4×0.5=﹣×=+++= 12.56÷3.14=
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= 12.56÷3.14=