Question

3 7/8*4/5-1 5/8*4/5=
4 7/9* 1 13/14-3 7/12*1 13/14+1 13/14*1 13/18
Вычислите значение выражение удобным способом)

Answer 1

1) = 4/5 • ( 3 7/8 - 1 5/8 ) = 4/5 • 2 1/4 = 4/5 • 9/4 = 9/5 = 1 4/5 = 1,8
•••••••
2) = 1 13/14 • ( 4 7/9 - 3 7/12 + 1 13/18 ) = 1 13/14 • ( 4 14/18 + 1 13/18 - 3 7/12 ) = 1 13/14 • ( 5 27/18 - 3 7/12 ) = 1 13/14 • ( 6 1/2 - 3 7/12 ) = 1 13/14 • ( 6 6/12 - 3 7/12 ) = 1 13/14 • ( 5 18/12 - 3 7/12 ) = 1 13/14 • 2 11/12 = 27/14 • 35/12 = 35/56 = 5/8

Answer 2

27/14 * 35/12 = 9*5 / 2*4 = 45/8 = 5 5/8

Answer 3

1)   ...=(3 7/8-1 5/8)*4/5=2 2/8*4/5=2 1/4*4/5=9/4*4/5=9/5=1 4/5

2)   ...=(4 7/9-3 7/12+1 13/18)*1 13/14=(4 28/36-3 21/36+26/36)*27/14=2 33/36*27/14=2 11/12*27/14=35/12*24/14=135/24=5 15/24=5 5/8

Answer 4

у Вас верно!