78x99+78=78x99+78x1
=78(99+1)
= 78.100
=7800
=78 x 99 + 78
= 78 x ( 99 + 1 )
= 78 x 100
= 7800
78 x 99 + 78
= ( 99 + 1 ) x 78
= 100 x 78
= 7800
~ Chúc bạn hok tốt ~
78 x 99 + 78 = 78 x ( 99 + 1 ) = 78 x 100 = 7800
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Trả lời:
78 x 99 + 78 = 78 x 99 + 78 x 1
= 78 x ( 99 + 1 )
= 78 x 100
= 7800
Trả lời :
78 x 99 + 78
= 78 x ( 99 + 1 )
= 78 x 100
= 7800
78 x 99 + 78 = 78 x (99 + 1) = 78 x 100 = 7800
\(78\times99+78\)
\(=78\times(99+1)\)
\(=78\times100\)
\(=7800\)
