请给下面的小数分类.①0.4747…②3.6777…③23.256256 ④3.777…⑤4.7.55 ⑥1.32020…
用简便方法计算.6×9+9.2×4+9 (3.75+4.1+2.35)×9.8.
脱式计算(能简算要简算)(1)(66﹣32×1.2)÷0.25 (2)10×+17×75%﹣7×0.75(3)0.25×(5(3﹣2.5×)) (4)9.99×22.2+33.3×3.34.
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递等式计算(能简算的要写出简算过程)1.25×2.5×32 [2﹣(0.5+×2.4)]÷10÷8+3.96×12.5%+2.04×.
计算下面各题(能简算的要简算).360÷15﹣2.5×14 ×〔÷(﹣)〕 25×1.25×325.25﹣(+4.25) ×2012 3.5×98+0.2×35.