Toán Lớp 6: 38 x (27 – 44) – 27 x (38 – 44)
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Toán Lớp 6: 38 x (27 – 44) – 27 x (38 – 44)
Tính
Comments ( 2 )
$ 38 . ( 27 – 44 ) – 27 . ( 38 – 44 ) $
$ = 38. 27 – 38. 44 – 27. 38 + 27. 44 $
$ = (38. 27 – 27. 38) + (27. 44 – 38. 44) $
$ = 0 + 44 . ( 27 – 38 ) = 44. (-11)=-484 $
38 x (27 -44 ) -27 x (38 -44)
= 38 x (-17 ) -27 x (-6)
= (-646 ) +162
= (-484)