c) (43-14).(-5)+15.(-14-6) d) (-42).(35-16)-35.(16-42)

2 câu trả lời

$\text{Đáp án : c) ( 43 - 14 ) . ( -5 ) + 15 . ( -14 - 6 ) }$

$\text{= 29 . ( -5 ) + 15 . ( -20 ) }$

$\text{= -145 + ( -300 ) }$

$\text{= -445}$

$\text{d) ( -42 ) . ( 35 - 16 ) - 35 . ( 16 - 42 ) }$

$\text{= -42 . ( 19 ) - 35 . ( -26 ) }$

$\text{= -798 - ( -910 )}$

$\text{= 112 }$ 

 

Đáp án : c) ( 43 - 14 ) . ( -5 ) + 15 . ( -14 - 6 ) 

= 29 . ( -5 ) + 15 . ( -20 ) 

= -145 + ( -300 ) 

= -445

d) ( -42 ) . ( 35 - 16 ) - 35 . ( 16 - 42 ) 

= -42 . ( 19 ) - 35 . ( -26 ) 

= -798 - 910

= -1698  

 

Câu hỏi trong lớp Xem thêm

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