zad 1
do liczby -25 1/3 dodaj sume liczb -2 1/4 i 4 1/3
zad 2
od liczby 8,3 odejmij roznice liczby 7 i liczby -2,45
zad 3
do sumy liczb -4 i -5 dodaj roznice liczby -3,2 i liczby -1,8
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Zad1
1. 25 1/3 + (-2+1/4+1/3)=25 1/3 +(-2+ 3/12+ 4/12)= 25 1/3 +(1 -5/12)= 25 4/12 + (-1 5/12)=23 1/12
zad2
8,3-(7-2,45)= 8,3-4,55=3,75
zad3
(-4+(-5))+(3,2-(-1,8)=-9+ (-1,4)=-10,4
NieMaZaCo :P