1/3+4/5+1/12= 2/7+1/6+1/9=

Question

1/3+4/5+1/12= 2/7+1/6+1/9=

Answer 1

Тут легче поменять местами 4/5 и -1/12, тогда:
1/3-1/12+4/5 = 1*4/12 - 1/12 + 4/5 = (4-1)/12 + 4/5 = 3/12 + 4/5 = 1/4 +4/5 = 1*5/20 +4*4/20 = (5+16)/20 = 21/20 = 1,05

2/7-1/6+1/9 = 2*6/42 - 1*7/42 +1/9 = (12-7)/42 + 1/9 = 5/42 + 1/9 = 5*3/126 + 1*14/126 = (15+14)/126 = 29/126 = 0,23

Comments

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Answer 2

1/3+4/5+1/12=20/60+48/60+5/60=73/60= 1 13/60
2/7+1/6+1/9=36/126+21/126+14/126=71/126