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calculati_________!!!!!!#

Calculati class=

Răspuns :

2/5+3/10=4/10+3/10=7/10
2/9+2/3=2/9+6/9=8/9
3/4+5/8=6/8+5/8=11/8
7/8+1/2=7/8+4/8=11/8
1/2+1/4=2/4+1/4=3/4
3/10+2/5=3/10+4/10=7/10
1/6+2/3=1/6+4/6=5/6
3/5+1/20=12/20+1/20=13/20

2/5+3/10=4/10+3/10=7/10
2/9+2/3=2/9+6/9=8/9
3/4+5/8=6/8+5/8=11/8
7/8+1/2=7/8+4/8=11/8
1/2+1/4=2/4+1/4=3/4
3/10+2/5=3/10+4/10=7/10
1/6+2/3=1/6+4/6=5/6
3/5+1/20=12/20+1/20=13/20