Question

найдите значение сумм 5целых1/10+8целых3/8;9целых3/20+7целых4/15;6целых11/12+3целых15/16

Answer 1

5 1/10  +  8 3/8 = 51/10 + 67/8   = (51 × 4  +  67 × 5)/40 = 204/40  +  335/40 =  539/40 = 13 19/40
 9 3/20  +  7 4/15 = 183/20  +  109/15 =   (183 × 3  +  109 × 4)/60 = 549/60  +  436/60 =  985/60 = 197/12 = 16 5/12
6 11/12 + 3 15/16 = 83/12 + 63/16 = (83 × 4 + 63 × 3)/48 = 332/48+189/48 = 521/48 = 10 41/48