只用考慮各個(gè)加數(shù)的個(gè)位數(shù)就可以了
1^1 個(gè)位數(shù)是1
2^2 個(gè)位數(shù)是4
3^3 個(gè)位數(shù)是7
4^4 個(gè)位數(shù)是6
5^5 個(gè)位數(shù)是5
6^6 個(gè)位數(shù)是6
7^7 個(gè)位數(shù)是3
8^8 個(gè)位數(shù)是6
9^9 個(gè)位數(shù)是9
所以 和的個(gè)位數(shù)是（1+4+7+6+5+6+3+6+9）的個(gè)位數(shù).
1+4+7+6+5+6+3+6+9=47 個(gè)位是7
所以
1的1次方+2的2次方+3的三次方+……9的9次方的個(gè)位數(shù)字是7.