正方形數！有冇人識呀？唔該！

吾明你講咩..不過到試下答你
如困係邊長:
1=1cm平方.1cm立方
2=4=8
3=9=27
4=16=64
5=25=125
6=36=216
7=49=334
8=64=512
9=63=567
10=100=1000(全都是心算...有錯吾好怪)
你可以用計算器計

in simple
1正方形數=1^2=1
2正方形數=2^2=1+3=4
3正方形數=3^2=1+3+5=9

得知
n^2= 1+3+5+......+(2n-3)+(2n-1)
你一路咁+落去
心水清的,去到5x都memorise到

answer : 1,4,9,16,25,36,49,64,81,100,121,144,169,196,225,256,289,324,361,400

1 , 4 , 9 , 16 , 25 , 36 , 49 , 64 , 81 , 100 , 121 , 144 , 169 , 196 , 225 , 256 , 289 , 324 , 361 , 400

1,4,9,16,25,36,49,64,81,100,121,144,169,196,225,256,289,324,361,400

1x1=1
2x2=4
3x3=9
4x4=16
5x5=25
6x6=36
7x7=49
8x8=64
9x9=81
10x10=100
11x11=121
12x12=144
13x13=169
14x14=196
15x15=225
16x16=256
17x17=289
18x18=324
19x19=361
20x20=400

1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400

1,4,9,16,25,36,49,64,81,100, 121,144, 169 ,225, 256, 289, 361, 400