(1+3+5+……+1001)-(2+4+6+……+1000)用小学数学方法来解
2019-04-30
(1+3+5+……+1001)-(2+4+6+……+1000)
用小学数学方法来解
优质解答
=1+(3-2)+(5-4)+(7-6)+.....+(1001-1000)
=1+1+1+1+.....+1 (有1000/2 个1)
=1+1*500
=501
=1+(3-2)+(5-4)+(7-6)+.....+(1001-1000)
=1+1+1+1+.....+1 (有1000/2 个1)
=1+1*500
=501