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Dalina20
a fost răspuns

Calculati folosind proprietatile adunarii :
a). 2/25+15/28+23/25+13/28=
b). 3/7+2/9+4/7+7/9=
c). 4/5+3+1/5=
d). 2+4/11+3+7/11=

Răspuns :

Tincaw
a)25/25+28/28=1+1=2    ; b)7/7+9/9=1+1=2    ; c) 3+5/5=3+1=4   ; d)2+3+11/11=5+1=6

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