33 x 55 + 33 x 66 - 33 x 21

= 33 x ( 55 + 66 - 21 )

= 33 x 100

= 3300

\(33.55+33.66-33.21=33.\left(55+66-21\right)=33.100=3300\)

\(33\cdot55+33\cdot66-33\cdot21\)

\(=33\cdot\left(55+66-21\right)\)

\(=33\cdot100\)

\(=3300\)

11x11=121

22x22=484

33x33=1089

44x44=1936

55x55=3025

66x66=4356

k mk nhé,1000000%  đúng

11 x 11 = 121

22 x 22 = 484

33 x 33 = 1089

44 x 44 = 1936

55 x 55 = 3025

66 x 66 = 3356

11 x 11 = 121

22 x 22 = 484

33 x 33 = 1089

44 x 44 = 1936

55 x 55 = 3025

66 x 66 = 4356

66 x 25 +5 x 66+66 x 14 + 33 x 66

= 66 x ( 25+5+14+33)

= 66 x 77

= 11 x 6 x 11 x 7

= 11 x( 6x 7)

 = 11 x 42

= 462

tick cho mình nha,Mạnh Dũng

33 phần 100 x 33 + 33 phần 100 x 66 + 33 phần 100 x 1

= 33 phần 100 x ( 33 + 66 + 1 )

= 33 phần 100 x 100

=3300 phần 100 = 33 phần 1 = 33

33/100×(33/100+66)

33/100×(33/100+66/1)

33/100×(33/100+6600/100)

33/100×6633/100

19899/100

33/100 + 33/100 x 33+ 66 x 33/100

= 3,3+3,3 x 33+ 66 x 3,3

= 3,3x ( 1+33+66)

=3,3 x 100=330

\(=438\times\left(66+33+1\right)\\ =438\times100\\ =43800\)

= 438 × ( 66 + 33 + 1 ) = 438 × 100 = 43800

=438 x (66+33+1)

=438 x 100

=43800

y:66 dư 37 => y = 66k+37=66k+33+4 => y:33 dư 4 mà x:33 dư 5 =>x+y chia 33 dư 9

\(x=66-33\)

\(x=33\)

ủng hộ nha

x+33=66

x=6633

x=33

vậy x=33

x=66-33

x=33

(45+75)*66+(75+45)*34

=(45+75)*(66+34)

=120*100

=12000

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

=11+22+33+44+55+66+77+88+9

=(11+9)+(22+88)+(33+77)+(44+66)+55

=20+110*3+55

=20+330+55

=405

Ta có :

a, (45 + 75) x 66 + (75 + 45) x 34

=  (45 + 75) x (66 + 34)

=   120  x 100

=  12000

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

= 33 + 77 + 121 + 165 + 9

= 405

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

\(\left(11+99\right)+\left(22+88\right)+\left(33+77\right)+\left(44+66\right)+55:11\)

\(110+110+110+110+55:11\)

\(440+55:11\)

\(445\)

2491 nha lê thu uyên

 31 x 66 - 38 x 33 - 3283

= 2064 - 1254 - 3283

= 810 - 3283

=-2473