Odpowiedź:
a)
-13 + (-14) = -13 - 14 = -27
-30 + 15 = -15
-103 + (-130) = -103 - 130 = -233
b)
-7 + 52 = 45
-103 + 77 = -26
-108 + 130 = 22
c)
-19 + 7 = -12
79 + (-19) = 79 - 19 = 60
-25 + 31 = 6
d)
[tex]-9\frac{1}{2}+7=-2\frac{1}{2}[/tex]
[tex]-\frac{3}{5}+(-\frac{3}{5})=-\frac{3}{5}-\frac{3}{5}=-\frac{6}{5}=-1\frac{1}{5}[/tex]
[tex]-5\frac{3}{4}+\frac{1}{4}=-5\frac{2}{4}=-5\frac{1}{2}[/tex]
e)
-14 + 7,6 = -6,4
-6,2 + (-4) = -6,2 - 4 = -10,2
-0,75 + (-1) = -0,75 - 1 = -1,75
f)
[tex]-5+\frac{1}{2}=-4\frac{1}{2}[/tex]
[tex]-0,2+1\frac{1}{5}=-\frac{1}{5}+1\frac{1}{5}=1[/tex]
[tex]0,25+(-\frac{1}{4})=0,25-0,25=0[/tex]
Szczegółowe wyjaśnienie:
