1) 3 1/5+1/4= 16/5+1/4=64/20+5/20=69/20=3 9/20
2) 3 9/20 * 3 1/5 = 69/20 * 16/5 = 11,04
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1) 3 1/5+1/4= 16/5+1/4=64/20+5/20=69/20=3 9/20
2) 3 9/20 * 3 1/5 = 69/20 * 16/5 = 11,04