七年级上学期数学有理数运算口算竞赛100题.doc

七年级上学期数学有理数口算练习100题
姓名__________ 评分__________
(说明:要求直接写答案,30分钟内完成)
(1) (―3)+(8)= (2) (+11)+(-29)=
(3) = (4) (-)+(-)=
(5) (+2)-(+9)= (6) (-)-(+)=
(7) = (8) =
(9)-3×(+2)= (10)(-5)×(-2)=
(11)= (12)
(13) (14)-×8=
(15) (-3)×(+12)= (16)(-)×(-4)=
(17)(-)×(-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) (-)+()=_______ (52) - (-)= __________
(53) (-)-|-|=__________ (54)
(55) (56) __________
(57)(-12)+(+5) = (58)(-32)+(-24)=
(59) 的相反数是1/4, (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-(-) =
(73) 2× = (74) -9+19=
(75) -13-(1+) = (76) ÷(-4) =
(77) (-1)÷(-1)