99999+9999+999+99+9
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解:99999+9999+999+99+9等于( 111105 )
∵已知需求出99999+9999+999+99+9等于多少
∴99999 + 9999 + 999 + 99 + 9
= (100000 - 1)+ (10000 - 1)+ (1000 - 1)+ (100 - 1)+(10 - 1)
= 100000 - 1 + 10000 - 1 + 1000 - 1 + 100 - 1 + 10 - 1
= (100000 + 10000 + 1000 + 100 + 10)+ (-1 - 1 - 1 - 1 - 1)
= (110000 + 1000 + 100 + 10)+ (-2 - 1 - 1 - 1)
= (111000 + 100 + 10)+ (-3 - 1 - 1)
= (111100 + 10)+(-4 - 1)
= 111110 - 5
= 111105
答:99999+9999+999+99+9等于111105
∵已知需求出99999+9999+999+99+9等于多少
∴99999 + 9999 + 999 + 99 + 9
= (100000 - 1)+ (10000 - 1)+ (1000 - 1)+ (100 - 1)+(10 - 1)
= 100000 - 1 + 10000 - 1 + 1000 - 1 + 100 - 1 + 10 - 1
= (100000 + 10000 + 1000 + 100 + 10)+ (-1 - 1 - 1 - 1 - 1)
= (110000 + 1000 + 100 + 10)+ (-2 - 1 - 1 - 1)
= (111000 + 100 + 10)+ (-3 - 1 - 1)
= (111100 + 10)+(-4 - 1)
= 111110 - 5
= 111105
答:99999+9999+999+99+9等于111105
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