Question

10．根據(jù)$\frac{1}{6}$÷a=$\frac{2}{5}$，寫一個除法和一個乘法算式分別是$\frac{1}{6}÷\frac{2}{5}=a$和$\frac{2}{5}a=\frac{1}{6}$．

Answer 1

分析 根據(jù)乘與除的互逆運算：被除數(shù)÷除數(shù)=商，除數(shù)=被除數(shù)÷商；被除數(shù)=商×除數(shù)；進行解答．

解答 解：根據(jù)除數(shù)=被除數(shù)÷商，可得：$\frac{1}{6}÷\frac{2}{5}=a$，
根據(jù)被除數(shù)=商×除數(shù)，可得：$\frac{2}{5}a=\frac{1}{6}$，
故答案為：$\frac{1}{6}÷\frac{2}{5}=a$，$\frac{2}{5}a=\frac{1}{6}$．

點評 此題考查除法各部分之間的關(guān)系：被除數(shù)÷除數(shù)=商，除數(shù)=被除數(shù)÷商；被除數(shù)=商×除數(shù)．