Question

resolva as expreoes a seguir. (A) 45 - [( 4/5 X 2 /7) : (3/5 X 3) + 3 ] = (B) 13- 3/8:4/9=

Answer 1

a. 45-[(4/5×2/7)÷(3/5×3/1)+3]
45-[8/35÷9/5+3]
45-[8/35×5/9+3]
45-[40/315+3/1]
45-[40/315+3/1×315/315]
45-[40/315+945/315]
45/1-985/315
45/1×315/315-985/315
14175/315-985/315
13190/315

b. 13-(3/8÷4/9)
13-(3/8×9/4)
13/1-27/24
13/1×24/24-27/24
312/24-27/24
285/24