能简便的请用简便运算 1.43+2.95-0.43 [4/9]×[3/4]-([7/16]-[1/4]) 6.4÷0.4

1个回答

  • 解题思路:(1)根据加法交换律进行计算;

    (2)先算乘法和小括号里面的减法,最后算括号外面的减法;

    (3)根据连除的性质进行计算;

    (4)根据乘法分配律进行计算.

    (1)1.43+2.95-0.43,

    =1.43-0.43+2.95,

    =1+2.95,

    =3.95;

    (2)[4/9]×[3/4]-([7/16]-[1/4]),

    =[1/3]-[3/16],

    =[7/48];

    (3)6.4÷0.4÷0.25,

    =6.4÷(0.4×0.25),

    =6.4÷0.1,

    =64;

    (4)95×[5/6]+95×[1/6],

    =95×([5/6]+[1/6]),

    =95×1,

    =95.

    点评:

    本题考点: 运算定律与简便运算;分数的四则混合运算;小数四则混合运算.

    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.