0.625*0.5+5/8*1/2-5/8简便计算一根铁丝长4m,用去四分之一,剩下的铁丝比用去的长多少m?孙辉9月份买书花了45元钱,张小兰买书所花的钱是孙辉的九分之八,同时又是王东的七分之四,王东买书花了
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![0.625*0.5+5/8*1/2-5/8简便计算一根铁丝长4m,用去四分之一,剩下的铁丝比用去的长多少m?孙辉9月份买书花了45元钱,张小兰买书所花的钱是孙辉的九分之八,同时又是王东的七分之四,王东买书花了](/uploads/image/z/24545-65-5.jpg?t=0.625%2A0.5%2B5%2F8%2A1%2F2-5%2F8%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E4%B8%80%E6%A0%B9%E9%93%81%E4%B8%9D%E9%95%BF4m%2C%E7%94%A8%E5%8E%BB%E5%9B%9B%E5%88%86%E4%B9%8B%E4%B8%80%2C%E5%89%A9%E4%B8%8B%E7%9A%84%E9%93%81%E4%B8%9D%E6%AF%94%E7%94%A8%E5%8E%BB%E7%9A%84%E9%95%BF%E5%A4%9A%E5%B0%91m%3F%E5%AD%99%E8%BE%899%E6%9C%88%E4%BB%BD%E4%B9%B0%E4%B9%A6%E8%8A%B1%E4%BA%8645%E5%85%83%E9%92%B1%2C%E5%BC%A0%E5%B0%8F%E5%85%B0%E4%B9%B0%E4%B9%A6%E6%89%80%E8%8A%B1%E7%9A%84%E9%92%B1%E6%98%AF%E5%AD%99%E8%BE%89%E7%9A%84%E4%B9%9D%E5%88%86%E4%B9%8B%E5%85%AB%2C%E5%90%8C%E6%97%B6%E5%8F%88%E6%98%AF%E7%8E%8B%E4%B8%9C%E7%9A%84%E4%B8%83%E5%88%86%E4%B9%8B%E5%9B%9B%EF%BC%8C%E7%8E%8B%E4%B8%9C%E4%B9%B0%E4%B9%A6%E8%8A%B1%E4%BA%86)
0.625*0.5+5/8*1/2-5/8简便计算一根铁丝长4m,用去四分之一,剩下的铁丝比用去的长多少m?孙辉9月份买书花了45元钱,张小兰买书所花的钱是孙辉的九分之八,同时又是王东的七分之四,王东买书花了
0.625*0.5+5/8*1/2-5/8简便计算
一根铁丝长4m,用去四分之一,剩下的铁丝比用去的长多少m?
孙辉9月份买书花了45元钱,张小兰买书所花的钱是孙辉的九分之八,同时又是王东的七分之四,王东买书花了多少钱?(完成关系式,在用方程解)。( )
0.625*0.5+5/8*1/2-5/8简便计算一根铁丝长4m,用去四分之一,剩下的铁丝比用去的长多少m?孙辉9月份买书花了45元钱,张小兰买书所花的钱是孙辉的九分之八,同时又是王东的七分之四,王东买书花了
0.625*0.5+5/8*1/2-5/8
=5/8*1/2+5/8*1/2-5/8
=5/8*(1/2+1/2-1)
=5/8*0
=0
一根铁丝长4m,用去四分之一,剩下的铁丝比用去的长多少m
(4-4×1/4)-4×1/4
=3-1
=2(米)
孙辉9月份买书花了45元钱,张小兰买书所花的钱是孙辉的九分之八,同时又是王东的七分之四,王东买书花了多少钱?(完成关系式,在用方程解).( )
设王东买书花了X元
数量关系式:王东买书花的钱数×七分之四=孙辉买书花45元×九分之八
X×七分之四=45×九分之八
X=40÷7分之4
X=70
解由0.625*0.5+5/8*1/2-5/8
=5/8×1/2+5/8*1/2-5/8
=5/8×(1/2+1/2)-5/8
=5/8-5/8
=0
2解用去1/4,还剩下3/4
即剩下的铁丝比用去的长是4×3/4-4×1/4=3-1=2m
3设王东买书花了x元
则列方程为4/7×x=45×8/9
即4/7×x=40
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解由0.625*0.5+5/8*1/2-5/8
=5/8×1/2+5/8*1/2-5/8
=5/8×(1/2+1/2)-5/8
=5/8-5/8
=0
2解用去1/4,还剩下3/4
即剩下的铁丝比用去的长是4×3/4-4×1/4=3-1=2m
3设王东买书花了x元
则列方程为4/7×x=45×8/9
即4/7×x=40
解得x=70元
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