心算口算速算答案谁有心算口算速算的答案啊,有的话给追加分!~~要六年级下册的.谁有啊,急!

对不起啊，我只有三年级的呀！

42 -12 -108 = 30 -108 = -78 43 -3 -92 = 40 -92 = -52 44 + 6 -76 = 50 -76 = -26 45 + 15 -60 = 60 -60 = 0 46 + 24 -44 = 70 -44 = 26 47 + 33 -28 = 80 -28 = 52 48 + 42 -12 = 90 -12 = 78 49 + 51 + 4 = 100 ...