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我的數學心算很差, 請教我好嗎?

發問:

7 x 7 = 49 (我一想就知道) 7 x 7 x 7 = 49 x 7 =...........計唔掂. 我講緊心算 ! 更新: 咁如果 17x17x17 呢 ?????

最佳解答:

7 x 7 x 7 = 49 x 7 =( 50-1 ) x 7 =50 x 7 -1 x 7 =350 - 7 =343

其他解答:

17x17x17=17的3次方|||||I think you would like to improve 心算, you only need to practice, practice and practice in your daily life! :)|||||7 x 7 x 7 =49 x 7 =(40 x 7)+(9 x 7) =280+63 =343|||||7 x 7 x 7 = 49 x 7 = 50 x 7 - 7 = 350 - 7 = 343 I hope I can help you.
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