Compléter CE2 Chronomath 7Version en ligne Calcul mental - MHM Chronomaths 7 par Patricia B 1 5 x 5 = 3 x 4 = 14 x 10 = 15 + 15 = 400 + 200 = 1200 + 500 = moitié de 10 = double de 20 = 5 x 7 = 5400 + 27 = 300 + = 1000 210 + 90 = 2 x = 18 525 + 9 = 8 + 8 + 8 = moitié de 20 = 548 - 3 = 438 - = 432 double de 30 = 150 + 1050 = 625 x 10 = 250 x 20 = 168 + 19 = 1261 + 29 = 1500 - 7 = 7 x 9 = 30 x 10 = 6002 - 19 = 3050 - 50 = 9 x 10 x 2 =