Answer:
1. 2/9 - 1/6
2×2/9×2 - 1×3/6×3
4/18 - 3/18
2. 5/7 - 1/3
5×3/7×3 - 1×7/3×7
15/21 - 7/21
3. 5/9 - 1/3
5/9 - 1×3/3×3
5/9 - 3/9
4. 9/16 - 1/4
9/16 - 1×4/4×4
9/16 - 4/16
5. 5/7 - 2/5
5×5/7×5 - 2×7/5×7
25/35 - 14/35
6. 2/3 - 1/8
2×8/3×8 - 1×3/8×3
16/24 - 3/24
7. 6/10 - 1/8
6×8/10×8 - 1×10/8×10
48/80 - 10/80
38/80 ÷ 2/2
8. 3/4 - 2/6
3×3/4×3 - 2×2/6×2
9/12 - 4/12
9. 8/20 - 1/4
8/20 - 1×5/4×5
8/20 - 5/20
10. 4/7 - 1/2
4×2/7×2 - 1×7/2×7
8/14 - 7/14
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Verified answer
Answer:
1. 2/9 - 1/6
2×2/9×2 - 1×3/6×3
4/18 - 3/18
= 1/18
2. 5/7 - 1/3
5×3/7×3 - 1×7/3×7
15/21 - 7/21
= 8/21
3. 5/9 - 1/3
5/9 - 1×3/3×3
5/9 - 3/9
= 2/9
4. 9/16 - 1/4
9/16 - 1×4/4×4
9/16 - 4/16
= 5/16
5. 5/7 - 2/5
5×5/7×5 - 2×7/5×7
25/35 - 14/35
= 11/35
6. 2/3 - 1/8
2×8/3×8 - 1×3/8×3
16/24 - 3/24
= 13/24
7. 6/10 - 1/8
6×8/10×8 - 1×10/8×10
48/80 - 10/80
38/80 ÷ 2/2
= 19/40
8. 3/4 - 2/6
3×3/4×3 - 2×2/6×2
9/12 - 4/12
= 5/12
9. 8/20 - 1/4
8/20 - 1×5/4×5
8/20 - 5/20
= 3/20
10. 4/7 - 1/2
4×2/7×2 - 1×7/2×7
8/14 - 7/14
= 1/14