Matching Pairs matematicaOnline version flechas by mauro ciarlantini 1 81 + 45 - 33 2 30 - ( 9 x 3 ) 3 76 + (8x2) 4 638 - 429 - 109 5 466-128+137 6 23 x 2 - 29 7 245 + 176 - 207 8 25 x 3 3 17 25 + 25 + 25 92 100 93 475 214