a) (2/7 + 6) : (8/6 - 9/12) =
b) (3/8 + 4 x 1/2) : (3 x 2/3 + 1/4) =
c) (3 x 1/6 - 9/4) : (1 x 1/2 + 3 - 1/4) =
d) (3/4 + 1/3 x 2/5) : (4/3 x 5/2 - 3/4) =
e) (1 x 2/3 x 12/5 + 3/8) : (3/8 + 1/3 : 4/3) =
rápido pra entregar hj
Soluções para a tarefa
a) (2/7 + 6) ÷ (8/6 - 9/12)
44/7 ÷ 7/12
44/7 × 12/7
528/49 = 10,77551
b) (3/8 + 4 × 1/2) ÷ (3 × 2/3 + 1/4)
(3/8 + 2) ÷ (2 + 1/4)
19/9 ÷ 9/4
19/8 × 4/9
19/2 × 1/9
19/18 = 1,05
c) (3 × 1/6 - 9/4) ÷ (1 × 1/2 + 3 - 1/4)
(3 × 1/6 - 9/4) ÷ (1/2 + 3 - 1/4)
(1/2 - 9/4) ÷ 13/4
-7/4 × 13/4
-7 × 1/13
-7/13 = -0,538461
d) (3/4 + 1/3 × 2/5) ÷ (4/3 × 5/2 - 3/4)
(3/4 + 2/15) ÷ (2/3 × 5 - 3/4)
53/60 ÷ (10/3 - 3/4)
53/60 ÷ 31/12
53/60 × 12/31
53/5 × 1/31
53/155 = 0,3419354838709677
e) (1 × 2/3 × 12/5 + 3/8) ÷ (3/8 + 1/3 ÷ 4/3)
(2 × 4/5 + 3/8) ÷ (3/8 + 1/3 ÷ 4/3)
(8/5 + 3/8) ÷ (3/8 + 1/4)
79/40 ÷ 5/8
79/40 × 8/5
79/5 × 1/5
79/25 = 3,16
a)
= (2/7 + 6) ÷ (8/6 - 9/12)
= (2 + 42)/7 ÷ 4/3 - 9/12
= 44/7 ÷ (16 - 9)/12
= 44/7 ÷ 7/12
= 44/7 . 12/7
= (44 . 12)/(7 . 7)
= 528/49
b)
= (3/8 + 4 . 1/2) ÷ (3 . 2/3 + 1/4)
= (3/8 + 2) ÷ (2 + 1/4)
= (3 + 16)/8 ÷ (8 + 1)/4
= 19/8 ÷ 9/4
= 19/8 . 4/9
= 19/2 . 1/9
= (19 . 1)/(2 . 9)
= 19/18
c)
= (3 . 1/6 - 9/4) ÷ (1 . 1/2 + 3 - 1/4)
= (3 . 1/6 - 9/4) ÷ (1/2 + 3 - 1/4)
= (1/2 - 9/4) ÷ (2 + 12 - 1)/4
= (2 - 9)/4 ÷ 13/4
= - 7/4 ÷ 13/4
= - 7/4 . 4/13
= - 7 . 1/13
= - 7/1 . 1/13
= - (7 . 1)/(1 . 13)
= - 7/13
d)
= (3/4 + 1/3 . 2/5) ÷ (4/3 . 5/2 - 3/4)
= (3/4 + (1 . 2)/(3 . 5)) ÷ (2/3 . 5 - 3/4)
= (3/4 + 2/15) ÷ (2/3 . 5 - 3/4)
= (45 + 8)/60 ÷ (2/3 . 5/1 - 3/4)
= 53/60 ÷ ((2 . 5)/(3 . 1) - 3/4)
= 53/60 ÷ (10/3 - 3/4)
= 53/60 ÷ (40 - 9)/12
= 53/60 ÷ 31/12
= 53/60 . 12/31
= 53/5 . 1/31
= (53 . 1)/(5 . 31)
= 53/155
e)
= (1 . 2/3 . 12/5 + 3/8) ÷ (3/8 + 1/3 ÷ 4/3)
= (2 . 4/3 + 3/8) ÷ (3/8 + 1/3 . 3/4)
= (2/1 . 4/3 + 3/8) ÷ (3/8 + 1/4)
= ((2 . 4)/(1 . 3) + 3/8) ÷ (3/8 + 1/4)
= (8/3 + 3/8) ÷ (3/8 + 1/4)
= (64 + 15)/40 ÷ (3 + 2)/8
= 79/40 ÷ 5/8
= 79/40 . 8/5
= 79/5 . 1/5
= (79 . 1)/(5 . 5)
= 79/25
Att. YRZ