题目内容
算一算. 219-17×36÷34 |
(100+45)×32-80 |
102×88+712÷89 | 864÷(27-23)÷12. |
分析:(1)先算乘法,再算除法,最后算减法;
(2)先算加法,再算乘法,最后算减法;
(3)先算乘法和除法,再算加法;
(4)先算减法,再按照从左向右的顺序进行计算.
(2)先算加法,再算乘法,最后算减法;
(3)先算乘法和除法,再算加法;
(4)先算减法,再按照从左向右的顺序进行计算.
解答:解:(1)219-17×36÷34,
=219-612÷34,
=219-18,
=201;
(2)(100+45)×32-80,
=145×32-80,
=4640-80,
=4560;
(3)102×88+712÷89,
=8976+8,
=8984;
(4)864÷(27-23)÷12,
=864÷4÷12,
=216÷12,
=18.
=219-612÷34,
=219-18,
=201;
(2)(100+45)×32-80,
=145×32-80,
=4640-80,
=4560;
(3)102×88+712÷89,
=8976+8,
=8984;
(4)864÷(27-23)÷12,
=864÷4÷12,
=216÷12,
=18.
点评:此题主要考查整数的四则混合运算的运算顺序,然后再根据运算顺序进行计算.
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