解题思路:(1)根据乘法分配律进行简算;
(2)把32拆成4×8,然后再根据乘法交换律和结合律进行简算;
(3)先算除法,再算减法;
(4)根据乘法分配律进行简算;
(5)根据乘法分配律进行简算;
(6)3.73连续除以2.5与4,等于除以2.5与4的乘积.
(1)6.7×7.3+6.7×1.7+6.7,
=6.7×(7.3+1.7+1),
=6.7×10,
=67;
(2)1.25×0.25×32,
=1.25×0.25×(4×8),
=(1.25×8)×(0.25×4),
=10×1,
=10;
(3)21.36÷0.8-12.9,
=26.7-12.9,
=13.8;
(4)25.6-25.6×0.8,
=25.6×(1-0.8),
=25.6×0.2,
=5.12;
(5)7.65×101-7.65,
=7.65×(101-1),
=7.65×100,
=765;
(6)3.73÷2.5÷4,
=3.73÷(2.5×4),
=3.73÷10,
=0.373.
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: 根据题意,先弄清运算顺序,然后再进一步计算即可,能简算的要简算.