七年级上学期数学有理数口算竞赛100题
班别_______
姓名__________
学号_____________
评分__________
(说明:要求直接写答案,30分钟内完成)
(1)
(―3)+(-7)=
(2)
(+12)+(-29)=
(3)
=
(4)
(-3.6)+(-2.5)=
(5)
(+2)-(+9)=
(6)
(-3.8)-(+4.7)=
(7)
=
(8)
=
(9)-3×(+2)=
(10)(-5)×(-2)=
(11)=
(12)
(13)
(14)-0.125×8=
(15)
(-3)×(+12)=
(16)(-1.5)×(-4)=
(17)(-0.01)×(-264)=
(18)
(19)
=
(20)-(+2)2=
(21)
=
(22)
=
(23)
-(-2)2=
(24)
(-3)3=
(25)
-33=
(26)
-(-2)3=
(27)
(-2)2×(-2)3=
(28)
(-2)5=
(29)
()2=16,(30)()2=9;
(31)
()3=-8,(32)
()3=27
(33)
-60÷(-5)=;
(34)(-90)÷3=
(35)
4÷(-12)=;
(36)
-48÷(-6)=
(37)
化简
(38)1的倒数为
(39)-1的倒数为
(40)的倒数等于它本身
(41)(-3)2=;
(42)
-32=;
(43)
(-2)4=;
(44)
-24=;
(45)(-1)3=;
(46)-13=。
(47)如果n为正整数,(-1)2n=,(48)
(-1)2n-1=
(49)
-(-2)3=;
(50)
-(-2)2=
(51)
(-4.6)+(8.4)=_______
(52)
3.6-
(-6.4)=
__________
(53)
(-5.93)-|-5.93|=__________
(54)
(55)
(56)
__________
(57)(-12)+(+5)
=
(58)(-32)+(-24)=
(59)的相反数是4,(60)
0的相反数是,(61)
-(-4)的相反数是
(62)
绝对值最小的数是
(63)
-3的绝对值是
(64)绝对值是5的数是__________
(65)
=
(66)
-2-3=
(67)
-=
(68)
=
(69)
-=
(70)
=
(71)
8+(-)=
(72)
-5-(-0.25)
=
(73)
2×
=
(74)
-9+19=
(75)
-13-(1+0.5)
=
(76)
÷(-4)
=
(77)
(-1)÷(-1)
=
(78)
(―4)+(+5)=
(79)
+(―10)+(+4)=
(80)
(+4.7)―(―8.9)=
(81)
-(+7.5)+(―6)
=
(82)
=
(83)的相反数的绝对值是
.(84)
如果a,b互为相反数,那么a+b=
.(85)
绝对值在2与5之间的整数有
比较下列各数的大小(填“>”、“<”或“=”)
(86)
____
0
(87)
_____
(88)
0
(89)
有理数中绝对值最小的数是______________
(90)
一个数的绝对值是它本身,则这个数必为_____________
(91)
(-8)×(-2)×(-25)
=
(92)
=
(93)
(-2)×(-12)
=
(94)-12×(-3)=
(95)
=
(96)
-52×(-5)2=
(97)
(-2)2-(-3)2
=
(98)(-1)3-81÷(-9)
=
(99)
(-1)101+(-1)102+(-1)103
=
(100)
(-1)1·(-1)2·(-1)3·(-1)4=