Mathematics
Junior High
Solved
この問題の計算式を教えてください！
答えは、⑴8/9
⑵14/51です！
1次の計算をせよ。
1
1
11
1
11
口(1)
1×2
1
5×6
1
1
2×3
3×4
4×5
6×7
7×8
8×9
口(2) 。tgutnk1s*13x15+117
3×5
5×77×9
9×11
11×
13×15
15×17
Answers
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2番です