a) 22 11 22 21
---- : ---- = ---- x ------- = 2x3=6; se simplifica 22 cu 11=2, 21 cu 7=3
7 21 7 11
b)
1 2 3 1 3 4 3 4
--- : ----- :------ =------ x ------ x ------= ------- x ------- = 1x1=1
2 3 4 2 2 3 4 3
se simplifica 3 cu 3=1; 4 cu 4=1
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c)
1/2 · (2/3 :3/4)= 1/2 ·(2/3 ·4/3)=1/2 ·8/9=4/9