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深挖乘法分配律妙用，破解小数多步混合运算难题
2026-06-20
网络整理
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Key Point:大家好，今天要挑战的是一道小数简便运算题，看看谁的方法最巧妙，咱们这就开始！12.8×34.5+46.8×87.2+12.3×12.8一、观察数字特点原式： 12.8×34
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