解:①5.38-(1.5+2.38),
=5.38-1.5-2.38,
=(5.38-2.38)-1.5,
=3-1.5,
=1.5;
②5.68×99+5.68,
=(99+1)×5.68,
=100×5.68,
=568;
③126×98+126+63×2,
=126×98+126+126,
=(98+1+1)×126,
=100×126,
=12600;
④44×(
-
),
=44×
-
×44,
=20-11,
=9.
分析:①運用減法的性質(zhì)去括號,運用加法交換律簡算;
②運用乘法分配律的逆運算簡算;
③先算出63×2=126,運用乘法分配律的逆運算簡算;
④運用乘法分配律簡算.
點評:考查了運算定律與簡便運算,靈活運用所學(xué)的運算定律簡便計算.