Answer:
1. 1 4/12 + 3 2/12
1×12+4/12 + 3×12+2/12
16/12 + 38/12
54/12 ÷ 6/6
2. 5/8 + 3/8
8/8 ÷ 8/8
3. 5 3/15 + 7 2/15
5×15+3/15 + 7×15+2/15
78/15 + 107/15
185/15 ÷ 5/5
4. 1 3/4 + 2 3/4 + 1 1/4
1×4+3/4 + 2×4+3/4 + 1×4+1/4
7/4 + 11/4 + 5/4
5. 2 1/7 + 3 9/7 + 2 1/7
2×7+1/7 + 3×7+9/7 + 2×7+1/7
15/7 + 30/7 + 15/7
6. 3 5/9 + 2 1/9 + 3
3×9+5/9 + 2×9+1/9 + 3×9/1×9
32/9 + 19/9 + 27/9
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Verified answer
Answer:
1. 1 4/12 + 3 2/12
1×12+4/12 + 3×12+2/12
16/12 + 38/12
54/12 ÷ 6/6
= 9/2 or 4 1/2 (I)
2. 5/8 + 3/8
8/8 ÷ 8/8
= 1 (L)
3. 5 3/15 + 7 2/15
5×15+3/15 + 7×15+2/15
78/15 + 107/15
185/15 ÷ 5/5
= 37/5 or 12 1/3 (O)
4. 1 3/4 + 2 3/4 + 1 1/4
1×4+3/4 + 2×4+3/4 + 1×4+1/4
7/4 + 11/4 + 5/4
= 23/4 or 5 3/4 (E)
5. 2 1/7 + 3 9/7 + 2 1/7
2×7+1/7 + 3×7+9/7 + 2×7+1/7
15/7 + 30/7 + 15/7
60/7 or 8 4/7 (M)
6. 3 5/9 + 2 1/9 + 3
3×9+5/9 + 2×9+1/9 + 3×9/1×9
32/9 + 19/9 + 27/9
= 78/9 or 8 2/3 (V)