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