Решите:(3/4- 5/6)*3+(3/4+5/6)*4=....?

Question

Решите:(3/4- 5/6)*3+(3/4+5/6)*4=....?

Answer 1

(3/4-5/6)*3+(3/4+5/6)*4=(9/12-10/12)*3+(9/12+10/12)*3=-1/12*3+20/12*3=-1/4+20/4=19/4=

=4 целых 3/4

Answer 2

1)0.75 2) 0.83 3)0.83-0.75=0.08 4)0.75 5)0.83 6)1.58 7)0.24 8)1.58*4=6.32   9)1.58+6.32=7.9