求12.5x0.25x3.2和12.5x4.5+4.5x12.5+12.5的简便计算 快明天就没用了!
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![求12.5x0.25x3.2和12.5x4.5+4.5x12.5+12.5的简便计算 快明天就没用了!](/uploads/image/z/3930634-10-4.jpg?t=%E6%B1%8212.5x0.25x3.2%E5%92%8C12.5x4.5%2B4.5x12.5%2B12.5%E7%9A%84%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97+%E5%BF%AB%E6%98%8E%E5%A4%A9%E5%B0%B1%E6%B2%A1%E7%94%A8%E4%BA%86%21)
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求12.5x0.25x3.2和12.5x4.5+4.5x12.5+12.5的简便计算 快明天就没用了!
求12.5x0.25x3.2和12.5x4.5+4.5x12.5+12.5的简便计算 快明天就没用了!
求12.5x0.25x3.2和12.5x4.5+4.5x12.5+12.5的简便计算 快明天就没用了!
12.5×0.25×3.2
=12.5×0.25×4×0.8
=(12.5×0.8)×(0.25×4)
=10×1
=10
12.5×4.5+4.5×12.5+12.5
=12.5×(4.5+4.5+1)
=12.5×10
=125