11 + 11 = 22

22 + 22 = 44

33 + 33 = 66

44 + 44 = 88

55 + 55 = 110

Học tốt~

11+11=22

22+22=44

33+33=66

44+44=88

55+55=110

tk mk ha 

11+11=22

22+22=44

33+33=66

44+44=88

55+55=110

from 11 to 99 has one number is 55 has the last digit is 5

and at least 1 number is even so the last digit of that product is 0

The answer is 0

FOR ME PLEASE

77+22=99

66+44=110

33+11=44

22+55=77

77+22= 99

66+44=110

33+11= 44

22+55=77

77+22=99

66+44=110

33+11=44

22+55=77

kb nha

a. 11 x11= 121 ; 22 x 22=484 , b.44 x 44 = 1936 ; 55 x 55 = 3025

a, 121

b, 484

c, 1089

d, 1936

e, 3025

HT và $$$

a) 121

    484

b) 1089

    1936

    3025

@Nghệ Mạt

#cua

= 1 + 11 + 11 + 11 + 11 = 1 + 4 . 11 = 1 + 44 = 45 

\(100-99+88-77+66-55+44-33+22-11\\ =\left(100-99\right)+\left(88-77\right)+\left(66-55\right)+\left(44-33\right)+\left(22-11\right)\\ =1+11+11+11+11\\ =1+11\times4\\ =1+44\\ =45\)

\(100-99+88-77+66-55+44-33+22-11\)

\(=1+11+11+11+11\)

=45

396,99

tick nhé 

mình nhanh nhất

ai tick mik mik tick lại cho

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

=110+110+110+110 +55:100

=440+55:100

=495 :100

=4,95

TICK NHA

22+11=33

22+22=44

22+33=55

22+44=66

33

44

55

66

k mình nhé bạn

33;44;55;66

1+2+3+4+5+6

= (1+6) x 3

= 7 x 3

= 21

11+22+33+44+55+66

= (11+66) x 3

= 77 x 3 

= 231

a/1 + 2 + 3 + 4 + 5 + 6

= (1 + 4 ) + (2 + 3) + 5 + 6

= 5 + 5 + 5 + 6

= 15 + 6

= 21

b/ 11+ 22 + 33 + 44 + 55 + 66

=(11+ 66) + (22 + 55) + (33 + 44)

= 77 + 77 + 77

= 77 x 3

=231

396 

k nha

bang 396

396 nhe