🍕🍕🍕 − 🍕 ＝ 🍕🍕
3/4 1/4 2/4 → 約分して 1/2
🎯 分子をひく → 3 - 1 = 2 → 2/4 → 約分 1/2
| 問題 | 答え |
|---|---|
| 3/4 - 1/4 = | 2/4 = 1/2 |
| 4/5 - 2/5 = | 2/5 |
| 5/6 - 1/6 = | 4/6 = 2/3 |
| 7/8 - 3/8 = | 4/8 = 1/2 |
| 4/7 - 2/7 = | 2/7 |
| 5/9 - 2/9 = | 3/9 = 1/3 |
| 6/10 - 4/10 = | 2/10 = 1/5 |
| 3/5 - 1/5 = | 2/5 |
| 8/9 - 5/9 = | 3/9 = 1/3 |
| 7/10 - 3/10 = | 4/10 = 2/5 |
💡 ポイント: 分母はそのまま、分子だけをひきます。約分も忘れずに