43.17 + 29.57 +13.43 + 57 = 43.(17 +13) + 57.(29 +1)

= 43.30 + 57.30 = 30. (43+57) = 3000

\(43.17+29.57+13.43+57\\ =43.\left(17+13\right)+57.\left(29+1\right)\\ =43.30+57.30\\ =30.\left(43+57\right)\\ =30.100\\ =3000\)

chúc bạn học tốt !!!

43.17 + 29.57 + 13.43 + 57 = (43.17) + (13.43) + (29.57) + 57 = 43. (17 + 13) + 57. (29 + 1) = 43.30 + 57.30 = (43 + 57).30 = 100.30 = 3000.

43.17+29.57+13.43+57

=43.17+29.57+13.43+57.1

=43.(17+13) + 57.(29+1)

=43.30 + 57.30

=(43+57) .30

=100.30

=3000

   43.17+29.57+13.43+57

=43.17+29.57+13.43+57.1

=43.(17+13)+57.(29+1)

=43.30+57.30

=30.(43+57)

=30.100

=3000 

\(43.17+29.54+13.43+54\)

\(=43.\left(17+13\right)+54.\left(29+1\right)\)

\(=43.30+54.30\)

\(=30.\left(43+54\right)\)

\(=30.97\)

\(=2910\)

a) 23.56 + 56.77 = (23 + 77).56 = 100.56 = 5600.

b) 32.19 + 32 = 32.(19 +1) = 32.20 = 640.

c) 35.34 + 35.86 + 65.75 + 65.45 = 35.(34 + 86) + 65.(75 + 45)

= 120.35+120.65 -120.(35 + 65) = 12000.

d) 43.17 + 29.57 +13.43 + 57 = 43.(17 +13) + 57.(29 +1)

= 43.30 + 57.30 = 30. (43+57) = 3000.

e) 3.25.8 + 4.37.6 + 2.3812 - 24.25 + 24.37 + 24.38

= 24.(25 + 37 + 38) = 2400.

f) 64.16 + 81.84+17.16 = 16.(64+17)+81.84 = 16.81+81.84

= 81.(16 + 84) = 8100

a) 23.56 + 56.77 = (23 + 77).56 = 100.56 = 5600.

b) 32.19 + 32 = 32.(19 +1) = 32.20 = 640.

c) 35.34 + 35.86 + 65.75 + 65.45 = 35.(34 + 86) + 65.(75 + 45)

= 120.35+120.65 -120.(35 + 65) = 12000.

d) 43.17 + 29.57 +13.43 + 57 = 43.(17 +13) + 57.(29 +1)

= 43.30 + 57.30 = 30. (43+57) = 3000.

e) 3.25.8 + 4.37.6 + 2.3812 - 24.25 + 24.37 + 24.38

= 24.(25 + 37 + 38) = 2400.

f) 64.16 + 81.84+17.16 = 16.(64+17)+81.84 = 16.81+81.84

= 81.(16 + 84) = 8100

\(\text{43.17+29.57+13.43+57}\)

\(=43.\left(17+13\right)+57.\left(29+1\right)\)

\(=43.30+57.30\)

\(=30.\left(43+57\right)\)

\(=30.100\)

\(=3000\)

Học tốt

43.17+29.57+13.43+57

 = 43.17 + 13.43 + 29.57 + 57

= 43 ( 17 + 13 ) + 57 ( 29 + 1 ) 

= 43 . 30 + 57 . 30 

= 30 ( 43 + 57 ) 

= 30 . 100 

= 3000 

43 . 17 + 29 . 57 + 13 . 43 + 57 

= 43 ( 13 + 17 ) + 57 ( 1 + 29 )

= 43 . 30 + 57 . 30

=  ( 43 + 57 ) . 30 

= 100 . 30

= 3000

Hok tốt 

# owe

a, Ta có : 32.19+32=32.(19+1)

                               =32.20

                               =640

43.17+29.57+13.43+57

=43.(17+13)+57.(29+1)

=43.30+57.30

=30.(43+57)

=30.100=3000

\(43.17+29.57+13.43+57\)

\(=43.\left(17+13\right)+57.\left(29+1\right)\)

\(\text{= 43.30 + 57.30}\)

\(=30.\left(47+57\right)\)

\(=30.100\)

\(=3000\)

Hok tốt !

\(43.17+29.57+13.43+57\)

\(=\left(43.17+13.43\right)+\left(29.57+57\right)\)

\(=43.\left(17+13\right)+57.\left(29+1\right)\)

\(=43.30+57.30\)

\(=30.\left(43+57\right)=30.100=3000\)

\(7^1+7^2+7^3+...+7^{117}+7^{118}=7\left(1+7+7^2\right)+7^4\left(1+7+7^2\right)+...+7^{116}\left(1+7+7^2\right)\)

\(=7.57+7^4.57+...+7^{116}.57=57\left(7+7^4+...+7^{116}\right)⋮57\)