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2.52×2.8+7.48×2.8      2.05÷0.82+37.6       69.6÷3.2÷2.5.

解:
(1)2.52×2.8+7.48×2.8,
=(2.52+7.48)×2.8,
=10×2.8,
=28;

(2)2.05÷0.82+37.6,
=2.5+37.6,
=40.1;

(3)69.6÷3.2÷2.5,
=69.6÷(3.2×2.5),
=69.6÷8,
=8.7.
分析:(1)根据乘法分配律进行计算;
(2)先算除法,再算加法;
(3)根据连除的性质进行计算.
点评:此题主要考查小数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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