Question

10+20+30+40...+1980.123=?

ai giup minh tick cho

 

Answer 1

Ta có: 10+20+30+40+...1980.123

=         10+20+30+40+....+243540

=         10+2x10+3x10+4x10+...+24354x10

=          10x(1+2+3+4+...+24354)

=         10x296570835

=          2965708350

Answer 2

Dễ vồn
 

Answer 3

ban oi sao lai 1980,123

Answer 4

1980 nhan 123 ay

Answer 5

1980 nhan 123

Answer 6

10+2.10+1.10+4.10+.....+24354.10

10.(1+2+3+4+........+24354)

10.296570835=2965708350