Question

100+200+300400+500+600+700+800+900+1000

Answer 1

100+200+300+400+500+600+700+800+900+1000

=(100+900)+(200+800)+(300+700)+(400+600)+(500+1000)

=1000+1000+1000+1000+1500

=2000+2000+1500

=4000+1500

=5500

Answer 2

5500

Ds 5500 nha ai k mik mik k lai

Answer 3

300+  400 đúng ko bn

Answer 4

ai ks mình mình ks lại cho 

Answer 5

Đáp án là 5500