实数专项训练题
答题规范示例: -17+(-4)×5+(-4)
解:原式=-17+(-4)×(5+1)
=-17-24 =-41
专训1:有理数的加减法
(1) (-3)-4+(-4)-(-18) (2) (-27)+(-3)-5+(-3)+7
(4) 5-18-5+(-16) (5) 9-(-20)+13-5
(7) 3+13+18+19 (8) (-8)+9-(-11)-1
(10)(+252)+23+14+(-12)+(-23)
1
(3) 3+(-3)+11-16 (6) 11-(-17)-6-18 (9) (-14)-3+13+(-4) 11)(-2113)+4+(-12)+(-83)
( (12)(-37)+(-1)+40+(-2) (13)(-7)+(-1.66)+(-113)+(-2.34)
(14)(-6)+8+(-4)+12 (15) -4.2+5.7-8.4+10 (16)(—8
(17)12
(19)0.5 (21)
12)+(9) 2347131101157 (18)+
37334612124119199.75+ (20) 2352322211+1 (22) 6.1-3.7-4.9+1.8 (23)23-17-(-7)+(-16) 353
(24) -216-157+348+512-678 (25) (-26.54)+(-6.4)-18.54+6.4 (26) -31+25+(-69)
(27) 0+1-[(-1)-(-
347111)-(+5)-(-)]+|-4| (28)(-4)-(-5)+(-4)-3 7782482
(29)(-
11111)-(-)-(+) (30)-0.5-(-3)+2.75-(+7) 23442(31)43+26 (32)87.5213
(33) (-
(35) 81.26-293.8+8.74+111 (36) (-4
(38)2
791629163747122151111)-(+)-(-)-(-) (34)(-8)-(+12)-(-70)-(-8); 326332312)-{3-[(-0.13)-(0.33)]} (37) 5-{-4-[3-7-(4-5)-6]} 25773725+(-2)+5+(-1)+2+(-3) 81258512(7)(7)(7)(7) (39)1
3
123100(40)1111 12123123100
专训2:有理数的乘除法
22(1)(-9)×3 (2)(-13)×(-0.26) (3)(-2)×31×(-0.5)
3114(4)3×(-5)+3×(-13) (5)(-4)×(-10)×0.5×(-3) (6)(-8)×3×(-1.8)
4437(7) (-0.25)×(-7)×4×(-7) (8)(-7)×(-5)×(-12)
1753(9)(-8)×4×(-2)×(-0.75) (10)(6―4―9)×36
1547(11)(-36)×(9+6-12) (12) 4×(-96)×(-0.25)×48
411331(13)(7-18+14)×56 (14)25×4-(-25)×2+25×4
4
(15)(-66)×〔122-(-3)+(-11)〕
21157537(16)18×(-72)+4×72-6×(-72)+(-9)×72
1161(17)0÷[(-34)×(-7)] (18)-3÷(3-4) (19)(-247)÷(-6)
313171(20)2÷(5-18)×18 (21) 13÷(-3)×(-3) (22) 8×(-14)÷(-8)
6351711513(23)(4-8)÷(-6) (24)-3.5 ×(6-0.5)×7÷2 (25)5×(-3-2)÷4
55355252(26)-17÷(-16)×18×(-7) (27)7÷(-25)-7×12-3÷4
5
(28)-2÷×(-
566112) (29)(-510)÷(+34)÷(-0.125) (30)2÷(-1)÷(-1); 51243(31)(-81)÷2××(-1211111) (32)(-3)÷(-1)×3 (33)(-)×(-)÷(-0.75) 492 (34)(-23)×827×(-1.5)÷(-169) 专训3:有理数的乘方
018= 52 (10)4 (0.2)2 (123)3 (2009)1 (1)20 33 (2)2 (35)2 (1) (4)233(13)2
2342 (35)24÷(1113-8-6). (2)3 0.13
(0.3)2 (112)2
(1)8888 (1)5555 104 (4)3
(1)4 (1)3102
(2) (2)2(5)3(5)
6
(3) (1)
1005(4)34 (4)32(10)3(10)218
142(5) 42(2)3(2)2() (6)102()2()3
2
(7)141722(3)2
(9)(23)222(6)(13)
(11)8(11)(1)2(254353)3
(13) (5)342(23)2(3)
55 (8) (81)9559(5)2 7113 (10) 6(63)1435
12) 23(2)3(6)(0.9)2(0.3) 14) 42(2)3(2)2(1)(46)22
7
( (
专训4 平方根与立方根
4的平方根是_________; 1211(2)(-)2的算术平方根是_________;
4(1)
(3)一个正数的平方根是2a-1与-a+2,则a=_________,这个正数是_________; (4)25的算术平方根是_________; (5)(-9)2的算术平方根是_________;
(6)4的值等于_________,4的平方根为_________; (7)(-4)2的平方根是_________,算术平方根是_________. (8)(2)2化简的结果是_________.
专训5 实数的混合运算
(1) 5711111414 (2)353 3253253
351512511(3)11 (4)3191
936464
2115155115(5)12 (6)12.45 ;
299229133612
23(7)3.527
21103.5273.527 (8)﹣12009+4×(﹣3)2+(﹣6)÷(﹣2) 9398
(9)19612138
(12)
(10)122
(11)28222311 823223 (13)52144 (14)(2)216327
(15)(﹣2)3+(﹣3)×[(﹣4)2+2]﹣(﹣3)2÷(﹣2);
(16)51.441030.02722
143232
1111(17) (18)132545
222221 47(19)0.4931832 (20)2342134
2329
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