Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a: \(8\times427\times3+6\times573\times4\)
\(=24\times427+24\times573=24\times\left(427+573\right)\)
=24x1000
=24000
b: \(54\times47-47\times53-20-27\)
\(=47\times\left(54-53\right)-47\)
=47-47
=0
c: \(6\times1235\times20-5\times235\times24\)
=120x1235-235x120
=120x1000
=120000
d: \(\left(137\times99+137\right)-\left(17\times101-17\right)\)
\(=137\times\left(99+1\right)-17\times\left(101-1\right)\)
=137x100-17x100
=13700-1700
=12000
e: \(\left(145\times99+145\right)-\left(143\times101-143\right)\)
=145x(99+1)-143x(101-1)
=14500-14300
=200
g: \(\left(2003-123\times8:4\right)\times\left(36:6-6\right)\)
\(=\left(2003-123\times2\right)\times\left(6-6\right)\)
=0
c) \(\left(11+12+13+...+19\right).\left(6.8-48\right)=\left(11+12+13+...+19\right).\left(48-48\right)\)
\(=\left(11+12+13+...+19\right).0\)
\(=0\)
Hok "tuốt" nha^^
b) \(\left(500.9-250.18\right).\left(1+2+3+...+9\right)=\left(250.2.9-250.18\right).\left(1+2+...+9\right)\)
\(=\left(250.18-250.18\right).\left(1+2+3+...+9\right)\)
\(=0.\left(1+2+3+...+9\right)\)
\(=0\)
Hok tốt nha^^ (lần 2)
a) \(136+326+64\)
\(=\left(136+64\right)+326\)
\(=200+326\)
\(=526\)
b) \(69+\left(31+57\right)\)
\(=\left(69+31\right)+57\)
\(=100+57\)
\(=157\)
c) \(755+321+145+179\)
\(=\left(755+145\right)+\left(321+179\right)\)
\(=900+500\)
\(=1400\)
d) \(17+123+378+583+122\)
\(=\left(17+583\right)+\left(378+122\right)+123\)
\(=600+500+123\)
\(=1100+123\)
\(=1223\)
145,46 - 356,64 : 16 + 37,009
= 145,46 - 22,29 + 37,009
= 123,35 + 37,009
= 160,359
( 145 x 99 + 145 ) - ( 143 x 101 - 143 )
= ( 145 x 99 + 145 x 1 ) - ( 143 x 101 - 143 x 1 )
= { 145 x ( 99 + 1 ) } - { 143 x ( 101 - 1 ) }
= 145 x 100 - 143 x 100
= 100 x ( 145 - 143 )
= 100 x 2
= 200
TK mk nha bn !!
( 145 x 99 + 145 ) - ( 143 x 101 - 143 )
= 145 x ( 99+ 1) - 143 x ( 101 - 1 )
= 145 x 100 - 143 x 100
= 14500 -14300
= 200
`a)145×16+145×83+123×22`
`=145xx(16+83)+123xx22`
`=145xx99+123xx22`
`=145xx9xx11+123xx2xx11`
`=1305xx11+246xx11`
`=(1305+246)xx11`
`=1551xx11`
`=`\(17061\)
`145 xx 16 + 145 xx 83 + 123 xx 22`
`=145 xx (16 +83) + 123xx 22`
`=145 xx 99+123xx22`
`=145 xx 9 xx 11+123 xx 21 xx 1`
` = (1305+246) xx 11`
`=1551 xx 11 =17061`
\(=145\cdot\left(16+83\right)+123\cdot22=145\cdot99+123\cdot22=17061\)