August 2018 1 22 Report
Oblicz:
a)30-12=
18-23
(-18)- 23=

b)30-(-12)=
(-23) + (-18)=
(-12)- 30=

c)23- 18=
(-30) - 12 =
12 - 30=

d)(-12) - (-30)=
12 - (-30)=
(-30) - (-12)=

Daje naj!
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