Toán Lớp 5: Giúp em vs ạ
7,82×2,7-5,39×2,7
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Toán Lớp 5: Giúp em vs ạ
7,82×2,7-5,39×2,7
Comments ( 2 )
7,82 xx 2,7 – 5,39 xx 2,7
=> (7,82-5,39) xx 2,7
=> 2,43 xx 2,7
= 6,561
7,82×2,7-5,39×2,7
ta thấy 2,7 chung nên ta rút ra ngoài
=2,7 x (7,82-5,39)
=2.7 x 2,43
=6,561