解题思路:①0.11×1.8+8.2×0.11,利用乘法的分配律变成0.11×(1.8+8.2)计算简便;
②2.34×99+2.34,利用乘法的分配律变成 2.34×(99+1)计算简便;
③5.4÷2.7×0.8,按从左到右的顺序依次计算;
④132×101,把101拆成(100+1),利用乘法的分配律计算;
⑤6.25÷1.25÷0.8变成6.25÷(1.25×0.8)计算简便;
⑥2.5×16,把16拆成4×4,再利用乘法的结合律计算.
①0.11×1.8+8.2×0.11,
=0.11×(1.8+8.2),
=0.11×10,
=1.1;
②2.34×99+2.34,
=2.34×(99+1),
=2.34×100,
=234;
③5.4÷2.7×0.8,
=2×0.8,
=1.6;
④132×101,
=132×(100+1),
=132×100+132,
=13332;
⑤6.25÷1.25÷0.8,
=6.25÷(1.25×0.8),
=6.25÷1,
=6.25;
⑥2.5×16,
=(2.5×4)×4,
=40.
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: 考查了运算定律与简便运算,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律简便计算.