Zad 1
Do liczby -12,5 dodaj iloczyn liczb 4 1/3 i -3,9
Zad 2
Do ilorazu liczby -4,8 przez liczbę -2 dodaj iloczyn liczb -1/2 i 4/5
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4 1/3*(-3,9)=4 1/3*(-3 9/10)=13/3*(-39/10)=(-507/30)
(-12,5)+(-507/30)=(-125/10)+(-507/30)=(-375/30)+(-507/30)=882/30=29 12/30= 29 4/10=29,4
(-4,8):(-2)=2,4 (-1/2)*4/5=(-4/10) =(-0,4)
2,4+(-0,4)=2