Помогите плиззз!!2 2/3*7 1/5+11/12*7 1/5-7 1/5*1 3/4

Question

Помогите плиззз!!2 2/3*7 1/5+11/12*7 1/5-7 1/5*1 3/4

Answer 1

2 2/3*7=8/3*7=56/3=18 2/3
1/5+11/12*7=1/5+77/12=12/60+385/60=397/60=6 37/60
1/5-7=1/5-6 5/5=-6 4/5
1/5*1 3/4=1/5*7/4=7/20

Answer 2

= 7 1/5 • ( 2 2/3 + 11/12 - 1 3/4 ) = 7 1/5 • ( 2 8/12 + 11/12 - 1 9/12 ) = 7 1/5 • ( 2 19/12 - 1 9/12 ) = 7 1/5 • 1 10/12 = 7 1/5 • 1 5/6 = 36/5 • 11/6 = 66/5 = 13 1/5 = 13,2