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