35 . 23 .+ 35 . 41 + 64 . 65 =35(23+41)+64.65=35.64+64.65=64(35+65)=64.100=6400
29 . 87 - 29 . 23 + 64 . 71 =29(87-23)+64.71=29.64+64.71=64(29+71)=29.100=2900
27 . 121 - 87 . 27 + 73 . 34 =27(121-87)+73.34=27.34+73.34=34(27+73)=34.100=3400
35 . 23 + 35 . 41 + 64 . 65 29 . 87 - 29 . 23 + 64 . 71
= 35 . ( 23 + 41 ) + 64 . 65 = 29 . ( 87 - 23 ) + 64 . 71
= 35 . 64 + 64 . 65 = 29 . 64 + 64 . 71
= 64 . ( 35 + 65 ) = 64 . ( 29 + 71 )
= 64 . 100 = 64 . 100
= 6400 = 6400
27 . 121 - 87 . 27 + 73 . 34
= 27 . ( 121 - 87 ) + 73 . 34
= 27 . 34 + 73 . 34
= 34 . ( 27 + 73 )
= 34 . 100
= 3400
Đó chính là câu trả lời bạn nhớ tích cho mình nhé
35.23+35.41+64.65=(23+41).35+64.65
=64.35+64.65
=(35+65).64
=100.64
=6400
\(35\cdot23+35\cdot41+64\cdot65\)
\(=35\cdot\left(23+41\right)+64\cdot65\)
\(=35\cdot64+64\cdot65\)
\(=\left(35+65\right)\cdot64\)
\(=100\cdot64=6400\)
\(29\cdot87-29\cdot23+64\cdot71\)
\(=29\cdot\left(87-23\right)+64\cdot71\)
\(=29\cdot64+64\cdot71\)
\(=\left(29+71\right)\cdot64\)
\(=100\cdot64=6400\)
\(27\cdot121-87\cdot27+73\cdot34\)
\(=27\cdot\left(121-87\right)+73\cdot34\)
\(=27\cdot34+73\cdot34\)
\(=\left(27+73\right)\cdot34\)
\(=100\cdot34=3400\)
giúp mình nha