Question

calcule:
A) 1/5 + 2/7 + 13/5=

B) 7/8 • 9/3=

C) 21/6 - 10/4=

D) 15/9 - 3/2=

Determine:

A) 1/5 de 1.800

B) 2/7 de 1.400

C) 3/4 de 2.000

Answer 1

Explicação passo-a-passo:

calcule:

A) 1/5 + 2/7 + 13/5=

14/5+2/7 = (7.14+5.2)/35

= (98+10)/35

= 108/35

B) 7/8 • 9/3

7/8.3= 21/8

C) 21/6 (:3)/(:3) - 10/4(:2)/(:2)

7/2 - 5/2 = 2/2= 1

D) 15/9 - 3/2= (2.15-9.3)/18

= (30-27)/18= 3/18 (:3)/(:3)= 1/6

Determine:

A) 1/5 de 1.800

1/5.1800= 360

B) 2/7 de 1.400

2/7.1400= 1400/7.2= 200.2= 400

C) 3/4 de 2.000

3/4.2000= 3.2000/4= 3.500= 1500