Question

oblicz.

1. 72 % z 25 =

2. 6x+8y dla x=0,4 i y = o,2 =

3. (a-b)-(a+b) dla a=6 i b = -3 =

Answer 1

Zad.1
72% z 25 = 72/100 * 25=72/4=18 
Zad.2
6*0,4 + 8*0,2=2,4+1,6=4,0
Zad3
(6+3)-(6-3)=9-3=6         - - = +               + - = -

Answer 2

1. 72%*25 = 72/100*25 = 72/4 = 18
2. 6x+8y, x=0.4, y=0.2
6*0.4+8*0.2 = 2.4+1.6 = 4
3. (a-b)-(a+b), a=6, b=-3
(6-(-3))-(6+(-3)) = (6+3)-(6-3) = 9 - 3 = 6