Question

Выполните сложение 2 7/10 +9 2/15 1 7/12 + 3 5/9 3 1/12 + 4 2/15

Answer 1

2(7/10)+9(2/15)=(27/10)+(137/15)=(27×3+137×2)/30=(81+274)/30=355/30=71/6=11(5/6)=11,83333333~10,83.

1(7/12) + 3(5/9)=(19/12)+(32/9)=(19×3+32×4)/36=(57+128)/36=186/36=5(5/36)=5,138888889~5,139.

3(1/12) + 4(2/15)=(37/12)+(62/15)=(37×5+62×4)/60=(185+248)/60=433/60=7(13/60)=7,216666667~7,217.