Question

Calcule a) -15-(3+25)+4 b) 4+(3-5)+(-2-6) c) 8-(3+5-20)+(3-10) d) 20-(-6+8)-(-1+3) e) 35-(4-1)-(-2+7)

Answer 1

a)-15 - (3 + 25) + 4 = 
-15 - (28) + 4 =
-15 - 28 + 4 = -43 + 4 =  - 39
b)4 + (3 - 5 ) + (-2 + 6 ) =
4 + (-2) + 4 = 
4 - 2 + 4 = 2 + 4 = 6
c)8 - (3 + 5 - 20 ) + ( 3 - 10 ) = 
8 - (8 - 20 ) + ( - 7 ) = 
8 - ( - 12) - 7 = 
8 + 12 - 7 = 20 - 7 = 13
d)20 - (-6 + 8) - (-1 + 3 ) =
20 - (+2) - ( + 2 ) =
20 - 2 - 2 = 20 - 4 = 16
e)35 - (4 - 1 ) - (-2 + 7 ) = 
35 - (3) - (+5) =
35 - 3 - 5 = 35 - 8 = 27