解题思路:(1)(6)运用乘法分配律简算;
(2)把102看作100+2,运用乘法分配律简算;
(3)运用除法的性质简算;
(4)(5)按运算顺序从左往右依次运算.
(1)3.25×0.45+6.75×0.45,
=(3.25+6.75)×0.45,
=10×0.45,
=4.5;
(2)7.5×102,
=7.5×(100+2),
=750+15,
=765;
(3)5.64÷0.125÷8,
=5.64÷(0.125×8),
=5.64÷1,
=5.64;
(4)26.9×0.48÷2.69,
=26.9÷2.69×0.48,
=1×0.48,
=0.48;
(5)5.4×2.5×0.7,
=13.5×0.7,
=9.45;
(6)39.5×99+39.5,
=39.5×(99+1),
=39.5×100,
=3950.
点评:
本题考点: 小数四则混合运算;运算定律与简便运算.
考点点评: 此题考查了小数的四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.