Question

Efetue as subtrações:

a)(+1/2)-(+5)= c)0-(-3/7)=

b)(+5/7)-(+1)= d)(-4)-(1/2)=

e)(+0,3)-(-1/5)= f)(+0,7)-(-1/3)=

Answer 1

Boa noite

a) (+1/2) - (+5 ) =  1/2 - 10/2 = -9/2

c) 0 - (-3/7) = = 3/7 

b) (+5/7) - (+1) = 5/7 - 7/7 = -2/7 

d) (-4) - (1/2) = -8/2 - 1/2 = -9/2 

e) (+0,3) - (-1/5) = 3/10 + 1/5 = 3/10 + 2/10 = 5/10 = 1/2 

f) (+0,7) - (-1/3) = 7/10 + 1/3 = 21/30 + 10/3 = 31/30