1 + 2 + 3 + 4 + 5 + 95 + 96 + 97 + 98 + 99
=(1 + 99) + (2 + 98) + (3 + 97) + (4 + 96) + (5 + 95)
= 100 + 100 + 100 + 100 + 100
= 100 x 5
= 500
=(5+95)+(4+96)+(3+97)+(2+98)+(1+99)
=100+100+100+100+100
=500
1 + 2 + 3 + 4 + 5 + 95 + 96 + 97 + 98 + 99
= ( 1 + 99 ) + ( 2 + 98 ) + ( 3 + 97 ) + ( 4 + 96 ) + ( 5 + 95 )
= 100 + 100 + 100 + 100 + 100
= 100 x 5
= 500
~~~ nếu đúng thì tk mk nha các bn ~~~
1 + 2 + 3 + 4 + 5 + 95 + 96 + 97 + 98 + 99
= (1 + 99) + (2 + 98) + (3 + 97) + (4 + 96) + (5 + 95)
= 100 + 100 + 100 + 100 + 100
= 100 x 5 = 500
=(1+99) + (2+98) + (3+97) + (4+96) + (5+95)
= 100 + 100 + 100 + 100 + 100
= 100 x 5
= 500
1+2+3+4+5+95+96+97+98+99=(1+99)+(2+98)+(3+97)+(4+96)+(5+95)
=100+100+100+100+100
=100x5
=500
1 + 2 + 3 + 4 + 5 + 95 + 96 + 97 + 98 + 99
= ( 99 + 1 ) + ( 98 + 2 ) + ( 97 + 3 ) + ( 96 + 4 ) + ( 95 + 5 )
= 100 + 100 + 100 + 100 + 100
= 100 x 5
= 500
= ( 1 + 99) + (2 + 98) + (3 + 97) + (4 + 96) + (5 + 95)
= 100 + 100 + 100 + 100 + 100
= 200 + 100 + 100 + 100
= 300+ 100 + 100
= 400 + 100
= 500
1 + 2 + 3+4 +5 + 95+ 96+ 97+98 +99 =
= (1+99) +(2+98)+(3+97) +(4+96) +(5+95)
= 100 +100 +100+ 100 +100
= 500
tk cho mình mình tk lại cho
thnk you verry much