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3248 x 246 - 3248 x 123 - 3248 x 23
=3248 x (246 - 123 - 23)
=3246 x 100
=324600
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=(3145-145)+(4246-246)+(2347-347)
=3000 +4000 +2000
= 9000
3145−246 + 2347−145 + 4246−347
= ( 3145 - 145 ) + ( 4246 - 246 ) + ( 2347 - 347 )
= 3000 + 4000 + 2000
= 7000+ 2000 = 9000
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=246 x 81 +246 x 18+246x1
=246 x(81+18+1)
=246x100=24600
k nha.thanks
246 x 81 + 246 x 18 + 246
= 246 x ( 81 + 18 + 1 )
= 246 x 100
= 24600
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a)
\(357\times46+357\times54\)
\(=357\times\left(46+54\right)\)
\(=357\times100\)
\(=35700\)
b)
\(246\times78-246\times68\)
\(=246\times\left(78-68\right)\)
\(=246\times10\)
\(=2460\)
a) 357x46+357x54
=357x(46+54)
=357x100
=35700
b) 246x78-246x68
=246x(78-68)
=246x10
=2460
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[247 x 315 + 246 x 314] x [98 x 47 - 94 x 49]
= [77805 + 77244] x [49 x 2 x 47 - 94 x 49]
= 155049 x [49 x 94 - 94 x 49]
= 155049 x [(49 - 49) x 94]
= 155049 x [0 x 94]
= 155049 x 0
= 0
Vì số nào nhân vói 0 cũng bằng 0 nha
246 x 79 - 246 - 246 x 68
= 246 x 79 - 246 x 1 - 246 x 68
= 246 x (79 - 1 - 68)
= 246 x (78 - 68)
= 246 x 10
= 2460
246x79-246-246x68
=246x79-246x1-246x68
=246x(79-68-1)
=246x10
=2460