Question

123+234+345+456+567+678+789

Answer 1

Bằng 2847 bạn ơi

Answer 2

123+234+345+456+567+678+789 

= 100+200+300+400+500+600+700+20+30+40+50+60+70+80+3+4+5+6+7+8+9

=100x(1+2+3+4+5+6+7)+10x(2+3+4+5+6+7+8)+(3+4+5+6+7+8+9)

=100x28+10x35+ 42

=3192

Answer 3

3192 nha

Answer 4

Trả lời:

123+234+345+456+567+678+789

= 3192

Hok tốt!

Answer 5

3192 bạn nhé !

Answer 6

123 + 234 + 345 + 456 + 567 + 678 + 789 = 3192