Sri Lanka skipper Mahela Jayawardene insisted the Bermuda attack had made his batsmen work hard, despite his side's 243-run win in Trinidad.
Jayawardene enjoyed a stand of 152 with Sangakkara
Sri Lanka made 321-6, Jayawardene hitting 85, before dismissing Bermuda for 78 in their Group B match.
"They bowled really well, except for a couple of wayward overs at the start," said man-of-the-match Jayawardene.
"Myself and Kumar Sangakkara (76) found it difficult but we decided keep wickets in tact for the last 20 overs."
Jayawardene continued: "The next games will be tougher than Bermuda but this is what makes the World Cup exciting.
"I think Bermuda bowled well and they will continue to learn. When we played our first tournament in 1975, we were thrashed by the West Indies.
"We learnt enough to win the tournament in 1996, so these associate teams must continue to play at this level and learn as much as possible.
"I have not been getting many runs over the past two months so obviously I was happy to get some today.
"Hopefully I can continue for the rest of the tournament and the other batsmen will all come good."
Farveez Maharoof took 4-23 and Lasith Malinga 3-10 as Bermuda crumbled to the second biggest defeat in World Cup history, and wicket-keeper Sangakkara was impressed with Sri Lanka's attack.
"The guys have been working really hard in practice, have done a lot of streamlining work since the India tour and it's paying dividends," he said.
"Hopefully, the further we get, the better they'll be. We play our brand of cricket and if we do it well, more often than not it works for us."