问题
解答题
12+22+32+---+92除以3的余数是多少?
答案
(12+22+32+…+92)÷3
=(1+4+9+…+81)÷3
=285÷3
=95.
答:12+22+32+---+92除以3的余数是0.
12+22+32+---+92除以3的余数是多少?
(12+22+32+…+92)÷3
=(1+4+9+…+81)÷3
=285÷3
=95.
答:12+22+32+---+92除以3的余数是0.