几道计算题一、 直接写得数:(共9分)1-0.09 = 4.25+0.5 = 28÷0.1 = 2÷5 = 0.49÷0.7= 0.15×20 = 6.2-2 = 2.5×0.04 = 9÷2.9 ≈( )(用四舍五入法得数保留两位小数)二、竖式计算:1.5×5.62= 81.04÷2.8 (除到

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