9x5+5=45+5=50,9X5十9=45+9=54,9x3一9=27-9=18,9X3一3=27-3=24,8X6一8=48-8=40,8x6一6=48-6=42.(请采纳)
1. 502. 543. 184. 245. 506. 42
49.54.18.24.40.42.
50,54,18,24,40,42