Cześć!
Szczegółowe wyjaśnienie:
a)
[tex] - 21 + ( - 4) = - 21 - 4 = - 25[/tex]
b)
[tex]3 \frac{1}{2} + 4 \frac{2}{5} = - \frac{7}{2} + \frac{22}{5} = \frac{9}{10} [/tex]
c)
[tex] - 0.37 + 0.25 = - (0.37 + 0.25) = - 0.12[/tex]
d)
[tex]1 \frac{3}{4} + 1.75 = \frac{7}{4} + \frac{7}{4} = \frac{7}{2} 3 \frac{1}{2} [/tex]
e)
[tex] - 4.21 + ( - 15.6) = - 4.21 - 15.6 = - 19.81[/tex]
f)
[tex]21 - 35 = - 14[/tex]
g)
[tex] - 16 - 14 = - 30[/tex]
h)
[tex]0.21 - ( - 1.3) = 0.21 + 1.3 = 1.51[/tex]
i)
[tex] - 5 \frac{1}{3} - ( - 4 \frac{2}{5} ) = - \frac{16}{3} + 4 \frac{2}{5} = - \frac{16}{3} + \frac{22}{5} = - \frac{14}{15} [/tex]
j)
[tex] - 1.25 - 4.6 = - (1.25 + 4.6) = - 5.85[/tex]
