1: 略
2: 略
3: 23/60 37/60
4: 9 5 18
------ 1----- 2 --------
14 9 19
5: 0.75 ≈0.889 ≈1.333
9/100 18/10 609/1000
6: < = >
7:① × ② √ ③ × ④ ×
提交 重置