Question

tính nhanh 

50 + 60 + 80 + 70 + 90 + 10 + 100 + 20 + 30 + 50

Answer 1

50 + 60 + 80 + 70 + 90 + 10 + 100 + 20 + 30 + 50

= (50 + 50) + (80 + 20) + (70 + 30) + (10 + 90) + 100 + 60

=      100    +       100   +      100    +     100     + 100 + 60

=                        560

Answer 2

(50+50)+(80+20)+(70+30)+(90+10)+(100+60)

=100+100+100+100+160

=560

Answer 3

50 + 60 + 80 + 70 + 90 + 10 + 100 + 20 + 30 + 50

= (50 + 50) + (80 + 20) + (70 + 30) + (90 + 10) + 100 + 60

= 100 + 100 + 100 + 100 + 100 + 60

= 500 + 60

= 560

k cho mk nha pạn

cảm ơn trước

Answer 4

50 + 60 + 80 + 70 + 90 + 10 + 100 + 20 + 30 + 50

= (50 + 50) + (80 + 20) + (70 + 30) + (10 + 90) + 100 + 60

= 100 + 100   + 100    + 100 + 100 + 60

= 560

Answer 5

=(50+50)+(80+20)+(70+30)+(90+10)+100+60

=100+100+100+100+100+60

=100.5+60

=500+60

=560

Answer 6

      50 + 60 + 80 + 70 + 90 + 10 + 100 + 20 + 30 + 50

= ( 50 + 50 ) + (80 + 20 ) + (70 + 30 ) + ( 90 + 10) +60

=  100 + 100 + 100 + 100 + 60

 =  100 x 4 + 60

= 460

K MK NHA

CẢM ƠN NHÌU

Answer 7

\(\text{50 + 60 + 70 + 80 + 90 + 10 + 100 + 20 + 30 + 50 }\)

\(=\left(50+50\right)+\left(80+20\right)+\left(70+30\right)+100+60\)

\(=100+100+100+100+100+60\)

\(=560\)