Question

Calcule o valor das expressões e apresente o resultado na forma de fração irredutível A) 0,5+ 1/4×1/3B) 1/2+1/3÷5/6C) 1/4×0,5+1/2 D) 15÷(3/4 - 1/4)E) ( 3 + 1/2 ) × 4/5F) ( 0,75 + 1/4 ) ÷ 2/5 + 1/2

Answer 1

A) 0,5 + 1/4 . 1/3 ------1/2 + 1/12 ------6/12 + 1/12 --------7/12

B) 1/2 + 1/3 ÷ 5/6 -----1/2 + 1/3 . 6/5 -----1/2 + 6/10 ----1/2 + 3/5 ---- (5 + 6)/10

11/10

C) 1/4 . 0,5 + 1/2 -----1/4. 1/2 + 1/2 ------1/8 + 1/2 ------ (1 + 4)/8 ----5/8

D) 15 ÷ (3/4 - 1/4) ---- 15 ÷ (2/4) ----- 15 . 4/2 ---- 60/2 ------- 30

E) ( 3 + 1/2 ) . 4/5 --------[(6 + 1)/2] . 4/5 ------7/2 . 4/5 ----28/10 ------14/5

F) ( 0,75 + 1/4 ) ÷ 2/5 + 1/2 ----( 3/4 + 1/4 ) ÷ 2/5 + 1/2 ----- 1 . 5/2 + 1/2

5/2 + 1/2 -----6/2 ------- 3