求下列各数的立方
(i) 7
(ii) 12
(iii) 16
(iv) 21
(v)40
(vi) 55
(vii) 100
(viii) 302
(ix) 301.
解题思路
我们需要求出给定数字的立方。
解答
(i) 73=7×7×7
=49×7
=343
(ii) (12)3=12×12×12
=144×12
=1728
(iii) (16)3=16×16×16
=256×16
=4096
(iv) (21)3=21×21×21
=441×21
=9261
(v) (40)3=40×40×40
=1600×40
=64000
(vi) (55)3=55×55×55
=3025×55
=166375
(vii) (100)3=100×100×100
=10000×100
=1000000
(viii) (302)3=302×302×302
=91204×302
=27543608
(ix) (301)3=301×301×301
=90601×301
=27270901
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