计算:
(1)计算:
.
(2)计算:
.
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54a62e0c176a70237e7703486764ea5.png)
(4)计算:
.
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfecbb906d313bdff483d7fa078ad0a.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109acf20d414a6ee008c1e9330a63f69.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54a62e0c176a70237e7703486764ea5.png)
(4)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2bcb96794dcb62e8e2dd8d69549601.png)
2023九年级·全国·专题练习 查看更多[1]
(已下线)实数03综合测
更新时间:2023-01-03 12:28:49
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解答题-计算题
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适中
(0.65)
【推荐1】定义一种新运算“※”,其规则为x※y=xy-x+y(等式右边的运算为平常的加、减、乘法运算).例如,2※3=2×3-2+3=7, (2a)※3=(2a)×3-2a+3=4a+3.
(1)根据规则计算3※ (-2)值为 ;
(2)已知ab=1,a-b=2,试求 (2a)※b+a※(2b)的值.
(3)有理数的加法和乘法运算都满足交换律,“※”运算是否满足交换律?若满足,请说明理由;若不满足,请举例说明.
(1)根据规则计算3※ (-2)值为 ;
(2)已知ab=1,a-b=2,试求 (2a)※b+a※(2b)的值.
(3)有理数的加法和乘法运算都满足交换律,“※”运算是否满足交换律?若满足,请说明理由;若不满足,请举例说明.
您最近一年使用:0次
解答题-计算题
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适中
(0.65)
【推荐2】计算:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f026af29e5ebba05d4c56774ff6bb27d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581b7dac7456a9d15b4fefec6418c7fc.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebf567934e4a5c483a05c31b5b29a54.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ff07309c1a1580f8cdcb64be07fc9d8.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fceae22038c51bec53782a986ff60b9.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3862293228d7cf4e219eaf0369d8ce0.png)
您最近一年使用:0次