分析:①96+320÷16-38根據四則混合運算的順,先算320÷16,再算96加320÷16的商,最后算減;
②730-(450+300)÷25,先算450+300的和,再算和除以25,最后算730減它們的差;
③(334-209)×8÷25,先算小括號里的334-209的差,再算乘和除;
④213×42+213×58,利用乘法的分配律變成213×(42+58)計算簡便;
⑤2.04-0.36-1.64利用一個數連續(xù)減去兩個數等于這個數減去這兩個數的和,變成2.04-(0.36+1.64);
⑥8.29+3.7+0.71+6.3利用加法的交換律和結合律變成(6.29+0.71)+(3.7+6.3)計算簡便.
解答:解;①96+320÷16-38,
=96+20-38,
=78;
②730-(450+300)÷25,
=730-750÷25,
=730-30,
=700;
③(334-209)×8÷25,
=125×8÷25,
=1000÷25,
=40;
④213×42+213×58,
=213×(42+58),
=213×100,
=21300;
⑤2.04-0.36-1.64,
=2.04-(0.36+1.64),
=2.04-2,
=0.04;
⑥8.29+3.7+0.71+6.3,
=(8.29+0.71)+(3.7+6.3),
=9+10,
=19.
點評:考察了運算定律和簡便計算,四則混合運算,注意運算順序和運算法則,靈活運用運算定律進行簡便計算.