2 練習問題1
日付( 月 日 曜日 ) 名前 ( )
練習問題2
1
次の分数を循環小数で表しなさい。
(1) 1
3 (2) 5
11 (3) 12
7
解
(1) 1 3
(2) 5 11
(3) 12 7
= 0.454545⋅ ⋅ ⋅= 0.·4·5
= 1.714285714285⋅ ⋅ ⋅ = 1.·71428·5
= 0.333⋅ ⋅ ⋅ = 0.·3
次の分数を循環小数で表しなさい。
(1) 2
3 (2) 1
6 (3) 3
7
解
(1) 2 3
(2) 1 6
(3) 3 7
= 0.666 ⋅ ⋅ ⋅ = 0.·6
= 0.428571428571 ⋅ ⋅ ⋅ = 0.·42857·1
= 0.1666 ⋅ ⋅ ⋅ = 0.1·6