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

= 35.(34+56+75+45) 

= 35. 210

= 7350

hình như sai rồi, bạn đọc kĩ đề đi =)

$35.34 + 35.56 + 65.75 + 65.45$

$=35.(34+56)+65.(75+45)$

$=35.90+65.120$

$=3150+7800$

$=10950$

Giải:

\(35.34+35.38+65.75+65.45\)

\(=35\left(34+38\right)+65\left(75+45\right)\)

\(=35.72+65.120\)

\(=2520+7800\)

\(=10320\)

Chúc bạn học tốt!

Bài 1 . Tính nhanh

35 . 34 + 35 . 38 + 65 . 75 + 65 + 45

= 35 . ( 34 + 38 ) + 65 . ( 75 + 45 )

= 35 . 72 + 65 . 120

= 2 520 + 7 800

= 10 320

35 . 34 + 35 . 38 + 65 . 75 + 65 . 45

= 35 . ( 34 + 38 ) + 65 . ( 75 + 45 )

= 35 . 72 + 65 . 120

= 2520 + 7800

= 10 320

35.34+35.38+65.75+65.45

=35(34+38)+65.(75+45)

=35.72+65.120

=2520+7800

=10320

cảm ơn nha

A,35*34+35*86+65*75+65*45

=35*[34+86]+65*[75+45]

=35*100+65*120

=35*100+65*100+65*20

=[35+65]*100+65*20

=10000+1300=11300

a) 35.34 + 35.86 + 65.75 + 65.45 =

( 35 + 65 ) x ( 34 + 86 ) + ( 75 + 45 )

100 x 120 x 120

100 x 14400

1440000

\(35\cdot34+35\cdot86+65\cdot75+65\cdot45\\ =35\cdot\left(34+86\right)+65\cdot\left(75+45\right)\\ =35\cdot120+65\cdot120\\ =120\cdot\left(35+65\right)\\ =120\cdot100\\ =12000\)

35.34+35.38+65.75+65.45

=35.(34+38)+65.(75+45)

=35.72+65.120

=2520+7800

=10320

  35.34+35.38+65.75+65.45

=35(34+38)+65(75+45)

=35.72+65.120=2520+7800=10320