Question

Ajuda porfavor e pra amanha pelo amor de deus

(1) calcule corretamente

a) 3/4-0,25

b) -0,25+(-0,75)

c) 5,4X(-20)

d) o,5X(-8/7)

e) (3/5)dividido(3/4)

f) (-5/6)dividido(-1/4

g) (0,5)X(1,4)+(2,1)

h) 1/2+1/4X(-7/2)-5/4X(-1/8)

Answer 1

a) 3/4 -0,25 = 0,75 -0,25 = 0,50

b) -0,25+(-0,75) = -0,25 -0,75 = -1

c) 5,4X(-20) = -108

d) 1/2 X(-2/7) = -2/14 = -1/7 ✓

e) (3/5):(3/4) = 3/5 × 4/3= 4/5

f) (-5/6):(-1/4) = -5/6 × -4/1 = 20/6=10/3

g) (0,5)X(1,4)+(2,1)= 0,7+2,1= 2,8

h) 1/2 +1/4X(-7/2) -5/4X(-1/8)

1/2 - 7/8 + 5/32

16/32 - 28/32 + 5/32

-7/32