Question

Determine o valor das expressões numéricas.
A) (⅓)² + (2/5)²=
B)¼ + (2/5)²-1/20=
C)(5/4 - ⅓)² ÷ 2/7=
D)(1-⅓)² ÷ (1- 2/5)²=

Answer 1

Boa tarde Felicity

a) 

(1/3)² + (2/5)² 
1/9 + 4/25 
25/225 + 36/225 = 61/225 

b)

1/4 + (2/5)² - 1/20
1/4 + 4/25 - 1/20
125/500 + 80/500 - 25/500
180/500 = 9/25

c)

(5/4 - 1/3)² = (15 - 4)²/12² = 121/144

(121/144)/(2/7) = (121/144)*(7/2) = 847/288

d)

(1 - 1/3)² / (1 - 2/5)²
(2/3)² / (3/5)²

(4/9)*(25/9) = 100/81