Question

1) Calcule, e use a tecnica do cancelamento quando possivel
A) 5/8 x 3/10 x 4=
B) 3/5 x 15/16 x 8/9=
C) 7/3 x 12/7 x 5/8 x 1/5=
D) 1/16 x 10/3 x 8/5 x 3/8=

2)Calcule as divisoes de fracaes
A) 21/16 : 3/8
B) 4/7 : 5/14
C)22/9:11/6
D) 3/8:21/16

3)Calcule o valor das expressoes numericas
A) 7+0,4 x 2,3 / 3-2,08 =
B) (2/3+1/2) x 6/5 3/2 - 3/4

POR FAVOR COLOQUE A CONTA NA 3, OBRIGADA

Answer 1

Resposta:

Explicação passo-a-passo:

a) 5/8 x 3/10 x 4 =

(5/8 x 3/10)    (5/10 = 1/2 )

 (1/8x3/2) 3/24 x 4= (3/24 = 1/8)

  1/8 x 4 = (÷4)

 1/4

b) 3/5 × 15/16 × 8/9 = 72/144

c) (7/3 × 12/7) × 5/8 =    (7/7 = 1)

    (1/3 x 12/1) x 5/8 =    (12/3 = 4)

            4 x 5/8 =             (4/8 = 1/2)

              = 5/2

Answer 2

Resposta:

usando a lei de cancelamento