Answer:
1. 5/7 - 2/7
2. 9/10 + 3/10
12/10 ÷ 2/2
3. 3/4 - 2/3
3×3/4×3 - 2×4/3×4
9/12 - 8/12
4. 5/6 + 1/7
5×7/6×7 + 1×6/7×6
35/42 + 6/42
5. 9/10 - 3/10 - 2/10
4/10 ÷ 2/2
6 2/7 + 3/7 + 5/7
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Verified answer
Answer:
1. 5/7 - 2/7
= 3/7
2. 9/10 + 3/10
12/10 ÷ 2/2
= 6/5
3. 3/4 - 2/3
3×3/4×3 - 2×4/3×4
9/12 - 8/12
= 1/12
4. 5/6 + 1/7
5×7/6×7 + 1×6/7×6
35/42 + 6/42
= 41/42
5. 9/10 - 3/10 - 2/10
4/10 ÷ 2/2
= 2/5
6 2/7 + 3/7 + 5/7
= 10/7