Answer:
1. 4/5 + 2/3
4×3/5×3 + 2×5/3×5
12/15 + 10/15
2. 3/6 + 4/9
3×3/6×3 + 4×2/9×2
9/18 + 8/18
3. 2/15 + 6/20
2×4/15×4 + 6×3/20×3
8/60 + 18/60
26/60 ÷ 2/2
4. 4/6 + 8/10
4×10/6×10 + 8×6/10×6
40/60 + 48/60
98/60 ÷ 2/2
5. 7/8 + 9/20
7×10/8×10 + 9×4/20×4
70/80 + 36/80
106/80 ÷ 2/2
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Answers & Comments
Answer:
1. 4/5 + 2/3
4×3/5×3 + 2×5/3×5
12/15 + 10/15
= 22/15
2. 3/6 + 4/9
3×3/6×3 + 4×2/9×2
9/18 + 8/18
= 17/18
3. 2/15 + 6/20
2×4/15×4 + 6×3/20×3
8/60 + 18/60
26/60 ÷ 2/2
= 13/30
4. 4/6 + 8/10
4×10/6×10 + 8×6/10×6
40/60 + 48/60
98/60 ÷ 2/2
= 49/30
5. 7/8 + 9/20
7×10/8×10 + 9×4/20×4
70/80 + 36/80
106/80 ÷ 2/2
= 53/40