解题思路:(1)根据乘法分配律进行计算;
(2)101=100+1,再根据乘法分配律进行计算;
(3)根据加法交换律和结合律以及减法的性质进行计算;
(4)先算乘法和除法,再算加法;
(5)中括号里面的根据乘法分配律进行计算,再算除法,最后算加法;
(6)先算除法,再算乘法.
(1)[5/11]×[7/9]+[7/9]×[6/11],
=([5/11]+[6/11])×[7/9],
=1×[7/9],
=[7/9];
(2)51×101,
=51×(100+1),
=51×100+51×1,
=5100+51,
=5151;
(3)10.25-3.75-6.25+7.75,
=(10.25+7.75)-(3.75+6.25),
=18-10,
=8;
(4)35×12+350÷70,
=420+5,
=425;
(5)3+0.7÷[([5/6]-[1/4])×24],
=3+0.7÷[[5/6]×24-[1/4]×24],
=3+0.7÷[20-6],
=3+0.7÷14,
=3+0.05,
=3.05;
(6)[1/3]÷[6/5]×[9/10],
=[5/18]×[9/10],
=[1/4].
点评:
本题考点: 分数的四则混合运算;整数四则混合运算;运算定律与简便运算;小数四则混合运算;整数、分数、小数、百分数四则混合运算.
考点点评: 此题主要考查分数、整数、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.