解题思路:(1)先算乘法,再算加法;
(2)根据乘法分配律进行简算;
(3)根据乘法分配律进行简算;
(4)根据除法的性质进行简算;
(5)先算减法,再算加法.最后算除法;
(6)先算除法,再算减法,最后算乘法.
(1)[i/i]+[1/i]×[i/6]
=[i/i]+[1/i]
=[14/1i];
(1)[i/7]×[1/4]+[4/7]÷4
=[i/7]×[1/4]+[4/7]×[1/4]
=([i/7]+[4/7])×[1/4]
=1×[1/4]
=[1/4];
(i)4.i×14.1
=4.i×(14+4.1)
=4.i×14+4.i×4.1
=4i+4.4i
=4i.4i;
(4)416÷1i÷4
=416÷(1i×4)
=416÷144
=4.16;
(i)[9/11]÷[[1/i]+(1-[14/11])]
=[9/11]÷[[1/i]+[1/11]]
=[9/11]÷[17/ii]
=[i/i];
(6)(i.个-1.个÷1)×4.i
=(i.个-1.4)×4.i
=1.4×4.i
=4.71.
点评:
本题考点: 分数的四则混合运算;小数四则混合运算.
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定律简便计算.