Matching Pairs Cálculo mentalOnline version Hacer cálculo mental by JESÚS SOLDEVILA ALBERT 1 6 x 3 + 19 2 9 x 7 + 12 3 5 x 8 - 16 4 5 x 3 + 16 5 6 x 4 - 15 6 6 x 8 - 13 7 8 x 8 + 14 8 6 x 6 + 19 9 5 x 7 - 14 10 7 x 4 - 12 11 12 x 5 12 5 x 5 - 13 13 9 x 8 + 17 14 8 x 2 + 18 35 34 24 78 16 21 31 55 9 37 60 75 12 89
