9+9*9
= 9+9 x 9
=9 x (9+10
= 9 x 10
= 90
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9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9
\(\dfrac{\dfrac{\dfrac{9}{9}}{\dfrac{9}{9}}}{\dfrac{\dfrac{9}{9}}{\dfrac{9}{9}}}+\dfrac{\dfrac{\dfrac{9}{9}}{\dfrac{9}{9}}}{\dfrac{\dfrac{9}{9}}{\dfrac{9}{9}}}=\)
9*9*9*9*9*9*9*9*9*9=?
9^9×9^8×9^7×9^6×9^5×9^4×9^3×9^2×9^1×9^0
9*9*9*9*9*9*9=9^?
Tính Nhanh:
(\(9^9\)+\(9^9\)+\(9^9\)+\(9^9\)+\(9^9\)+\(9^9\)+\(9^9\)+\(9^9\)+\(9^9\))-\(9^{10}\)
3+3+3+3+3+3+3+3+999999999999999999999999999999999+99+9+9+9+9+9++9+9+9+
9+9+9-9-9-9
Chứng minh rằng 9^9^9^9 - 9^9^9 chia hết cho 10
Giúp mình với ạ
tính:33...3(n-1 c/s 9)5.33...3(n-1 c/s 9)5
tính:66...6(n-1 c/s 9)7.66...6(n-1 c/s 9)7
tính:99...9(n+1 c/s 9).99...9(n+1 c/s 9)
tính:99...9(n c/s 9)5.99...9(n c/s 9)5