Question

calcule o valora
a) ( -16 ) – ( - 6 ) =
b) ( - 15 ) – ( - 7 ) =
c) ( - 25 ) – ( - 18 ) =
e) ( - 2 ) – ( 12 ) =
f) ( -1 ) – ( 5 ) =

Answer 1

a) -16 - (-16)= -16+16 = 0
b)(-15)-(-7)= -15+7= -8
c)(-25)-(-18)= -25+18 = -7
d)(-2)-(12)= -2-12= -14
f)(-1)-(5)= -1-5= -6

- (-) = +
- (+)= -
+(-)= -
+(+)= +

Answer 2

a) ( -16 ) – ( - 6 ) = - 16 + 6 = - 10

b) ( - 15 ) – ( - 7 ) = - 15 + 7 = - 8

c) ( - 25 ) – ( - 18 ) = - 25 + 18 = - 7

e) ( - 2 ) – ( 12 ) = - 2 - 12 = - 14

f) ( -1 ) – ( 5 ) = - 1 - 5 = - 6

**********************************
= 0,012 – (-3,75) + (-5,68) 

= 0,012 + 3,750 - 5,680

= 3,762 - 5,680

= - 1,918