A.0.43×10-4 B.0.43×104 C.4.3×10-5 D.0.43×105 查看更多

 

题目列表(包括答案和解析)

观察下列有规律的点的坐标:
A1(1,1);A2(2,-4);A3(3,4);A4(4,-2);A5(5,7);A6(6,-
4
3
);A7(7,10);A8(8,-1)…,
依此规律,A11的坐标为
(11,16)
(11,16)
,A12的坐标为
(12,-
2
3
(12,-
2
3

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将下列各数填入相应的集合中.
22
7
,-1,12,0,-3.01,-15,-
2
3
,180,-43,(-3)2,-45%,1,0.62.
(1)整数:
-1,12,0,-15,180,-43,(-3)2,1
-1,12,0,-15,180,-43,(-3)2,1

(2)自然数:
12,0,180,(-3)2,1
12,0,180,(-3)2,1

(3)正数:
22
7
,12,180,(-3)2,1,0.62
22
7
,12,180,(-3)2,1,0.62

(4)负数
-1,-3.01,-15,-43,-45%,
-1,-3.01,-15,-43,-45%,

(5)偶数:
12,0,180
12,0,180

(6)奇数:
-1,-15,-43,(-3)2,1
-1,-15,-43,(-3)2,1

(7)分数:
22
7
,-3.01,-
2
3
,-45%,0.62
22
7
,-3.01,-
2
3
,-45%,0.62

(8)非负数:
22
7
,12,0,180,(-3)2,1,0.62
22
7
,12,0,180,(-3)2,1,0.62

(9)非负整数:
12,0,180,1
12,0,180,1

(10)非负有理数:
22
7
,12,0,180,(-3)2,1,0.62
22
7
,12,0,180,(-3)2,1,0.62

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已知在直角梯形ABCD中,上底CD=4,下底AB=10,非直角腰BC=4
3
,则底角∠B=
 

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计算题:
(1)(-17)+(-3)
(2)8-(-12)
(3)(-10)×(-2.5)
(4)(-1
1
3
)×
6
7
÷(-
4
3

(5)-20+(-17)-(-18)-11
(6)(-8)×(-7)-12÷(-3)

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(2013•台湾)某社团有60人,附表为此社团成员年龄的次数分配表.求此社团成员年龄的四分位距为何?(  )
年龄(岁) 36 38 39 43 46 48 50 55 58 60 62 65
次数(人) 4 5 7 5 5 2 1 10 7 8 3 3

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