Toán Lớp 6: tính nhanh nếu có thể:
(158.129-158.39):180
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Toán Lớp 6: tính nhanh nếu có thể:
(158.129-158.39):180
Comments ( 2 )
Ta có:
(158.129−158.39):180
=158. (129−39) :180
=(158. 90) :180
=(79. 2 . 90) :180
=(79 . 180) :180
=79.
(158.129−158.39):180
=158.(129−39):180
=158.90:180
=79.2.90:180
=79.180:180
=79.