初中常用数的平方立方及开平方开立方表.doc

1—30的平方
1 2= 1
22= 4
32= 9
42= 16
52= 25
62= 36
72= 49
82= 64
92= 81
102= 100
112= 121
122= 144
132= 169
142= 196
152= 225
162= 256
172= 289
182= 324
192= 361
202= 400
212= 441

222= 484
232= 529
242= 576
252= 625
262= 676
272= 729
282= 784
292= 841
302= 900

1—10的立方
13= 1
23= 8
33= 27
43= 64
53= 125
63= 216
73= 343
83= 512
93= 729
103＝1000
2的1—10次方
21= 2
22= 4
23= 8
24= 16
25= 32
26= 64
27= 128
28= 256
29= 512
210= 1024

1-20平方根，1-10立方根表

平方根
√1 = 1
立方根

√2 = 1.4142135623731
3√1 = 1
√3 = 1.73205080756888
3√2 = 1.25992104989487
√4 = 2
3√3 = 1.44224957030741
√5 = 2.23606797749979
3√4 = 1.5874010519682
√6 = 2.44948974278318
3√5 = 1.7099759466767
√7 = 2.64575131106459
3√6 = 1.81712059283214
√8 = 2.82842712474619
3√7 = 1.91293118277239
√9 = 3
3√8 = 2
√10 = 3.16227766016838
3√9 = 2.0800838230519
√11 = 3.3166247903554
3√10 = 2.15443469003188
√12 = 3.46410161513775
√13 = 3.60555127546399
√14 = 3.74165738677394
√15 = 3.87298334620742
√16 = 4
√17 = 4.12310562561766
√18 = 4.24264068711928
√19 = 4.35889894354067
√20 = 4.47213595499958