5/14+3/21=
=5/14+1/7
=(5+2)/14
=7/14
=1/2
6/9×21/18=
=1/3×7/3
=7/9
15/32:9/8=
=15/32×8/9
=5/4×1/3
=5/12
Răspuns:
Explicație pas cu pas:
5/14+3/21=5/14+1/7=(5+2)/14=7/14=1/2
6/9×21/18==2/3×7/6=1/3×7/3=7/9
15/32×8/9=5/12
