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quynh2424
2 năm trước
Bài 3: Tính nhanh: a) 167. 89 - 167. 35 + 54. 833 b) 394. 768 + 606. 769 + 394 c) ( 21- 1).(21 - 2).( 21 - 3)…..( 21 - 21) d) 3 . 27 . 8 + 4 . 35 . 6 + 2 . 38 . 12 e) A = ( 1001 + 1002 + 1003 +....... + 2009). ( 360. 87 - 360.32 - 360. 55) f) B = 232323.79 - 797979. 23
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