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