빠른 계산 - 두 자리 수 제곱 (1)
Synopsis
Q. 51^2 = ? a) 2501 b) 2511 c) 2601 d) 2651 ☞ 이 수학 문제의 답은 무엇일까요? #제곱계산 #수학 #산수 #빠른계산 #사안수.
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