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45/3
15/3
5/5
1
245/5
49/7
7/7
1. mcm:3×3×3×5×7×7=6.615
135/3 245/5
45/3 49/7
15/3 7/7
5/5 1
1
135= 3^3 . 5 245= 5 . 7^2
mcm 135-245= 3^3 . 5 . 7^2 = 6615