(难度等级:★★★★☆)【五年级】妈妈买了1.5千克香蕉和1.8千克苹果,1千克苹果1.6元,1千克香蕉比1千克苹果贵1.4元。妈妈一共要付多少元?(解题思路及答案)(难度等级:★★★★☆)【五年级】计算:8.9×0.2+8.8×0.2+8.7×0.2+……+8.1×0.2(解题思路及答案)(难度等级:★★★★☆)【五年级】计算:1.25×0.25×3232×9.1(解题思路及答案)(难度等级:★★★★☆)【五年级】计算:4.83×0.59+0.41×1.59-0.324×5.9(解题思路及答案)(难度等级:★★★★☆)【五年级】计算:3.6×0.75×1.2÷(1.5×24×0.18)(解题思路及答案)(难度等级:★★★★☆)【五年级】计算:(1)0.125×400(2)2.5×10.8(解题思路及答案)(难度等级:★★★★☆)【五年级】计算:(1)392.6×192-39260×0.92(2)3.7×15+21×4.5(解题思路及答案)