Question

Calcule:
A) 5/4 - 7/6
B) -1,9+0,72
C) -2/5 + 0,7
D) 168 - 3,25
E) -4 +9/8
F) 5-3,195
G) - 11/3+ 3,5 ME AJUDEM PFV

Answer 1

a. 5/4-7/6 (×6/6)(×4/4)
30/24 - 28/24 = 2/24 = 1/12

b. -1,9+0,72 = -1,18

c. -2/5+0,7
-4/10+0,7
-0,4+0,7 = 0,3

d. 168 - 3,25
168,00 - 3,25 = 164,75

e. -4 + 9/8
-4/1 + 9/8
-4/1 × 8/8 + 9/8
-32/8 + 9/8 = -23/8

f. 5 - 3,195
5,000 - 3,195 = 1,805

g. -11/3 + 3,5
-11/3 + 35/10 (×10/10)(×3/3)
-110/30 + 105/30
-5/30 = -1/6