4. 3 2/3 × 6/4
= (3×3+2)/3 × 6/4
= 11/3 × 6/4
= 66/12
= 11/2
Answer: 11/2
or
Answer in a form of mixed fraction: 5 1/2
5. 21 1/8 × 3 1/5
= (8×21+1)/8 × (5×3+1)/5
= 169/8 × 16/5
= 2,704/40
= 338/5
Answer: 338/5
Answer in a form of mixed fraction: 67 3/5
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Answers & Comments
4. 3 2/3 × 6/4
= (3×3+2)/3 × 6/4
= 11/3 × 6/4
= 66/12
= 11/2
Answer: 11/2
or
Answer in a form of mixed fraction: 5 1/2
5. 21 1/8 × 3 1/5
= (8×21+1)/8 × (5×3+1)/5
= 169/8 × 16/5
= 2,704/40
= 338/5
Answer: 338/5
or
Answer in a form of mixed fraction: 67 3/5