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分数四则混合运算

苏教版六年级上册. 分数四则混合运算. 教学目标. 1. 使同学们结合解决实际问题的过程,理解并掌握分数四则混合运算的运算顺序,并能按运算顺序正确进行计算。 2. 在应用运算律进行分数简便计算的过程中,进一步培养同学们的观察、比较、分析和抽象概括的能力。. 分别说一说下面的算式的计算顺序:. 0.25+6-3.6 3.8+6.2×5. 9-【3.25× ( 5-3 ) -0.2】 3.8×2.5+6.2×2.5. 2.5×(6.2+3.8). 0.4. 0.6.

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分数四则混合运算

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  1. 苏教版六年级上册 分数四则混合运算

  2. 教学目标 1.使同学们结合解决实际问题的过程,理解并掌握分数四则混合运算的运算顺序,并能按运算顺序正确进行计算。 2. 在应用运算律进行分数简便计算的过程中,进一步培养同学们的观察、比较、分析和抽象概括的能力。

  3. 分别说一说下面的算式的计算顺序: 0.25+6-3.6 3.8+6.2×5 9-【3.25×(5-3)-0.2】 3.8×2.5+6.2×2.5 2.5×(6.2+3.8) 0.4 0.6

  4. 13 15 5 1 2 5 3 3 — ÷ — ×— + — — + — × — + — 14 28 8 4 3 9 2 2 1 1 3 2 3 3 5 3 — + — × — + — ( — - —×— )÷— 2 2 5 5 4 4 6 2

  5. 找朋友: 5 3 24×(— - — ) 6 8 3 8 1 —× (— + — ) 4 9 9 5 5 3 5 —× — + — ×— 8 9 8 9 7 3 — ×48 - —×48 24 16 5 3 24×— - — ×24 6 8 3 8 3 —× — + — ÷9 4 9 4 5 5 3 —×( — + — ) 9 8 8 7 3 1 (— - — ) ÷ — 24 16 48

  6. 6 3 3 5 -( — ÷ — - — ) 7 14 16

  7. 迁移应用:(注意灵活选择计算方法) 6 6 1 18 14 6 ÷ — + —×— — × 12 + 18 × — 7 7 6 13 13 11 8 11 4.6 × — + 8.4 ÷ — - — × 5 8 11 8

  8. 你收获了什么?

  9. 谢谢 再见

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