Question

20+25+20+100+200+300+400+25+25+25+20+20+20=?

Answer 1

=100+100+1000

=1200

Answer 2

1200 à? Mik tính nhẩm đó

Answer 3

20 + 25 + 20 + 100 + 200 + 300 + 400 + 25 + 25 + 25 + 20 + 20 + 20

= 20 x 5 + 25 x 4 + 100 + 100 x 2 + 100 x 3 + 100 x 4

= 100 x 1 + 100 x 1 + 100 x 1 + 100 x 2 + 100 x 3 + 100 x 4

= 100 x ( 1 + 1 + 1 + 2 + 3 + 4 )

= 100 x 12

= 1200

Answer 4

dễ quá bạn ạ 

Answer 5

= 20 x 5 + 25 x 4 + 100 + (100 x 2) + (100 x 3) + (100 x 4)

=100 + 100 + 100 + 200 + 300 + 400

=300 + 900

= 1200  

Answer 6

so can tim la 1200