7.24.28+ 49.19 - 21.35
= 7.24.4.7 + 49.19 - 7.3.7.5
= 49.96 + 49.19 - 49.15
= 49.(96 + 19 - 15)
= 49.100
= 4900
= 7 x 24 x 4 x 7 + 49 x 19 - 7 x 3 x 7 x 5
= 49 x 96 + 49 x 19 - 49 x 15
= 49 x ( 96 + 19 - 15 )
= 49 x 100
= 4900
Tk mk nha
7 x 24 x 28 + 49 x 19 - 21 x 35
= 7 x 24 x 4 x 7 + 7 x 7 x 19 - 7 x 3 x 7 x 5
= 7 x 7 x ( 24 x 4 + 19 - 3 x 5 )
= 49 x ( 96 + 19 - 15 )
= 49 x 100
= 4900
7.24.28+ 49.19 - 21.35
= 7.24.4.7 + 49.19 - 7.3.7.5
= 49.96 + 49.19 - 49.15
= 49.(96 + 19 - 15)
= 49.100
= 4900
chúc bn hok totí @_@