Tính nhanh:
326 x 728+ 327 × 272
2008 ×867+ 2009× 133
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`@` `\text {Ans}`
`\downarrow`
`a,`
\(\text{326 x 728 + 327 x 272}\)
`= 326 \times 728 + 326 \times 272 + 272`
`= 326 \times (728 + 272) + 272`
`= 326 \times 1000 + 272`
`= 362000 + 272`
`= 362272`
`b,`
\(\text{2008 x 867 + 2009 x 133}\)
`= 2008 \times 867 + 2008 \times 133 + 133`
`= 2008 \times (867 + 133) + 133`
`= 2008 \times 1000 + 133`
`= 2008000 + 133`
`= 2008133`
`c,`
\(\text{1235 x 6789 x (630 - 315 x 2 )}\)
`= 1235 \times 6789 \times (630 - 630)`
`= 1235 \times 6789 \times 0`
`= 0`
`d,`
\((m \div 1 - m \times 1 ) \div ( m \times 2008 + m + 2008)\)
`= (m - m) \div (m \times 2008 + m + 2008)`
`= 0 \div (m \times 2008 + m + 2008)`
`= 0`
a: =326*728+326*272+272
=326000+272
=326272
c: \(=1235\cdot6789\cdot\left(630-630\right)=0\)
d: \(=\left(m-m\right):\left(20009m+2008\right)=0\)
3457 - 27 x 48 - 48 x 73 + 6543
=3457 - 48 x ( 27 + 73) + 6543
=3457 - 48 x 100 + 6543
=(3457+ 6543) - 4800
=10000- 4800
=5200
a.326.728+327.272
=326.728+326.272+272
=326.(728+272) +272
=326.1000 +272
=326000+272
=326272
B, 1235.6789.(630-315.2)
=1235.6789.(630- 630)
=1235.6789.0
=0
C, 2008.867+2009.133
=2008.867+2008.133 +133
=2008.(867+133)+133
=2008.1000 +133
=2008000+133
=2008133
D, (m:1-m*1) : (m*2008+m+2008)
= (m-m) : (m*2008+m+2008)
= 0 : (m*2008+m+2008)
=0
TICK CHO MÌNH NHA
Giải:
326 x 728 + 327 x 272
= 326 x 728 + 326 x 272 + 272
= 326 x ( 728 +272 ) +272
= 326 x 1000 + 272
= 326 000 +272
= 326 272
TICK CHO MÌNH NHA
Giải:
2008 x 867 +2009 x 133
= 2008 x 867 + 2008 x 133 +133
= 2008 x ( 867 + 133) +133
= 2008 x 1000 +133
= 2 008 000 + 133
= 2 008 133
326*728 + 327*272
= 237328 + 88944
= 326272
{ m : 1 - m * 1 } : { m * 2008 + m + 2008 }
= { m -m } : { m * 2008 + m + 2008 }
= 0 : { m * 2008 + m + 2008 }
= 0
326 x 728 + 327 x 272
= 326 x 728 + 326 x 272 + 272
= 326 x ( 728 +272 ) + 272
= 326 x 1000 + 272
= 326000 + 272
= 326272
326 x 728 + 327 x 272
= 326 x 728 + 326 x 272 + 272
= 326 x (728 + 272) + 272
= 326 x 1000 + 272
= 326000 + 272
= 326272
8 x 427 x 3 + 6 x 573 x 4
= 8 x 3 x 427 + 6 x 4 x 573
= 24 x 427 + 24 x 573
= 24 x (427 + 573)
= 24 x 1000
= 24000
2008 x 867 + 2009 x 133
= 2008 x 867 + 2008 x 133 + 133
= 2008 x (867 + 133) + 133
= 2008 x 1000 + 133
= 2008133
326 x 728+ 327 × 272 =
237328+88944= 326272
2008 ×867+ 2009× 133 =
1740936+267197=2008133
nhớ k minh nha
a, 326 x 728 + 327 x 272
= ( 326 + 1 ) x 728 + 327 x 272
= 327 x 728 + 327 x 272
= 327 x ( 728 + 272 )
= 327 x 1000
= 327000
b, 2008 x 867 + 2009 x 133
= ( 2008 + 1 ) x 867 + 2009 x 133
= 2009 x 867 + 2009 x 133
= 2009 x ( 867 + 133 )
= 2009 x 1000
= 2009000