解题思路:(1)先算乘法,再算加法;
(2)把101看作(100+1),运用乘法分配律简算;
(3)运用乘法分配律简算;
(4)运用除法的性质简算;
(5)按照从左到右的顺序计算;
(6)运用乘法交换律与结合律简算.
(1)21.14+9.2×1.3
=21.14+11.96
=33.1;
(2)7.1×101
=7.1×(100+1)
=7.1×100+7.1
=710+7.1
=717.1;
(3)5.06×3.24+5.06×6.76
=5.06×(3.24+6.76)
=5.06×10
=50.6;
(4)7.8÷0.15÷4
=7.8÷(0.15×4)
=7.8÷0.6
=13;
(5)19.6÷3.2×8
=6.125×8
=49;
(6)0.25×0.69×4
=(0.25×4)×0.69
=1×0.69
=0.69.
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: 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或性质进行简便计算.