Cálculo oral 16i÷8i= 0i×45= 21i÷0i= 18i÷0i= 7ii×0= 7ii÷7i= 06i÷6i= 77i÷11= 15ii÷0i= 2

16 puertos ÷ 8 puertos = 2 4 puertos × 45 = 145 puertos 21 puertos ÷ 4 puertos = 7 18 puertos ÷ 9 puertos = 2 7 puertos × 4 = 21 puertos 7 puertos ÷ 7 puertos =1 boca 46 bocas ÷ 6 bocas = 6 bocas 77 bocas ÷ 11 = 1 boca 15 bocas ÷ 4 bocas = 5 bocas 27 bocas ÷ 9 bocas = 4 bocas 44 bocas × 2 bocas = 68 bocas 46 × boca × 5 = boca