Question

tính nhanh:

11+22+33+44+55+66+77+88+99

10+20+30+40+50

Answer 1

ket qua la:

=495

=150

Answer 2

11+22+33+44+55+66+77+88+99

= ( 11 + 88 ) + ( 22 + 77 ) + ( 33 + 66 ) + ( 44 + 55 ) + 99

= 99 + 99 + 99 + 99 + 99

= 99 x 5 

= 495

10+20+30+40+50

= ( 10 + 40 ) + ( 20 + 30 ) + 50

= 50 + 50 + 50

= 50 x 3 

= 150

K mình nha mình nhanh nhất đó!

Answer 3

ai k mik mik ks lại

11+22+33+44+55+66+77+88+99

=(11+99)+(22+88)+(33+77)+(44+66)+55

=110+110+110+110+55

=110*4+55

=440+55

=495

10+20+30+40+50

=(10+50)+(20+40)+30

=60+60+30

=60*2+30

=120+30

=150

Answer 4

(11+99)+(22+88)+(33+77)+(44+66)+55=

100+100+100+100+55=

= 455

(10+40)+(30+20)+50=

50+50+50=150

Answer 5

(11+99)+(22+88)+(77+33)+(66+44)+55=100+100+100+100+55=455

(10+50)+(20+30)+40=60+60+40=180

Answer 6

tính nhanh :

11 + 22 + 33 + 44 + 55 + 66 + 77 + 88 + 99

=(11 + 99) + (22 + 88) + (33 + 77) + (44 + 66) + 55

=     110    +      110    +       110    +     110    + 55

=     110 x 4 + 55

= 495

10 + 20 + 30 + 40 + 50 

= (10 + 40) + (20 + 30) + 50 

=       50     +      50     + 50

=         50 x 3

= 150 

k mình tch lại

Answer 7

11+22+33+44+55+66+77+88+99. :110 +110+110+110 +55 bằng495

Answer 8

11+22+33+44+55+66+77+88+99+10+20+30+40+50=645