用运算定律和性质填一填ac-bc=()·c 顺便用简便方法算下这题4759+1998=还有一题脱式计算39+0.18*80%-62.5%/5=
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![用运算定律和性质填一填ac-bc=()·c 顺便用简便方法算下这题4759+1998=还有一题脱式计算39+0.18*80%-62.5%/5=](/uploads/image/z/2685953-65-3.jpg?t=%E7%94%A8%E8%BF%90%E7%AE%97%E5%AE%9A%E5%BE%8B%E5%92%8C%E6%80%A7%E8%B4%A8%E5%A1%AB%E4%B8%80%E5%A1%ABac-bc%3D%28%29%C2%B7c+%E9%A1%BA%E4%BE%BF%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E7%AE%97%E4%B8%8B%E8%BF%99%E9%A2%984759%2B1998%3D%E8%BF%98%E6%9C%89%E4%B8%80%E9%A2%98%E8%84%B1%E5%BC%8F%E8%AE%A1%E7%AE%9739%2B0.18%2A80%25-62.5%25%2F5%3D)
用运算定律和性质填一填ac-bc=()·c 顺便用简便方法算下这题4759+1998=还有一题脱式计算39+0.18*80%-62.5%/5=
用运算定律和性质填一填ac-bc=()·c 顺便用简便方法算下这题4759+1998=
还有一题脱式计算
39+0.18*80%-62.5%/5
=
用运算定律和性质填一填ac-bc=()·c 顺便用简便方法算下这题4759+1998=还有一题脱式计算39+0.18*80%-62.5%/5=
用运算定律和性质填一填ac-bc=(a-b)·c
顺便用简便方法算下这题
4759+1998=4759+2000-2=6757
39+0.18*80%-62.5%/5
=39+0.144-0.125
=39.019