Question

ISSO É PRA AMANHÃ PFV AJUDEM!!!

A) (1/3)÷(-2/5)=
B) (-4/7)÷(1/2)=
C) -6÷ (+7/3)=
D) (-5/2)÷3=
E) 50÷(7-12)=
F) (20-14) ÷ (-2)=
G) (35-15)÷4=
H) (7-3-10)÷(5-6)=

sim...eu sou PÉSSIMA em matemática:/

Answer 1

Resposta:

A) (1/3)÷(-2/5) =

$\frac{1}{3} \div \frac{ - 2}{5} = \frac{1}{3} \times \frac{5}{ - 2} = \frac{1 \times 5}{3 \times - 2} = \frac{5}{ - 6}$

B) (-4/7)÷(1/2)=

$\frac{ - 4}{7} \div \frac{1}{2} = \frac{ - 4}{7} \times \frac{2}{1} = \frac{ - 4 \times 2}{7 \times 1} = \frac{ - 8}{7}$

C)-6÷ (+7/3)=

$\frac{ - 6}{1} \div \frac{7}{3} = \frac{ - 6}{1} \times \frac{3}{7} = \frac{ - 6 \times 3}{7 \times 1} = \frac{ - 18}{7}$

D) (-5/2)÷3=

$\frac{ - 5}{2} \div \frac{3}{1} = \frac{ - 5}{2} \times \frac{1}{3} = \frac{ - 5 \times 1}{2 \times 3} = \frac{ - 5}{6}$

E) 50÷(7-12)

50 ÷ (–5) = –10

F) (20-14) ÷ (-2)

6 ÷ (–2)= –3

G) (35-15)÷4

20 ÷ 4 = 5

H) (7-3-10)÷(5-6)

–6 ÷ (–1) = 6