Question

calcule o valor das expressões

b) (2-1/4) - (3-1/2)

c) (3/4 - 5/6) ÷ (1/2+1/4)

d) (-1+1/2) × (-2-3/4)

Answer 1

b) (2-1/4) - (3-1/2)
(8/4 - 1/4) - (12/4- 2/4)
7/4 - 10/4
-3/4

c) (3/4 - 5/6) ÷ (1/2+1/4)
(9/12 - 10/12) ÷ (2/4 + 1/4)
-1/12 ÷ 3/4
-4/36 (÷4)
-1/9

d) (-1+1/2) × (-2-3/4)
(-2/2 + 1/2) × (-8/4 - 3/4)
-1/2 × -11/4
11/8