Tính a ) 3 2/5 ± 2 5/7 = b ) 5 1/3 – 4 5/6 = c ) 2 3/8 ± 3 – 4 1/6 = Chú ý : dấu ± là cộng 3 2/5 , 2 5/7 , 5 1/3 , 4 5/6 , 2 3/

0 bình luận về “Tính a ) 3 2/5 ± 2 5/7 = b ) 5 1/3 – 4 5/6 = c ) 2 3/8 ± 3 – 4 1/6 = Chú ý : dấu ± là cộng 3 2/5 , 2 5/7 , 5 1/3 , 4 5/6 , 2 3/”

1. $\text{@Chiii S A D}$

   $a)$ $3$ `2/5` $+$ $2$ `5/7`

   $=$ `17/5` $+$ `19/7`

   $=$ `119/35` $+$ `95/35`

   $=$ `214/35`

   $b)$ $5$ `1/3` $-$ $4$ `5/6`

   $=$ `16/3` $-$ `29/6` 

   $=$ `96/18` $-$ `87/18`

   $=$ `9/18`

   Rút gọn $=$ `1/2`

   $c)$ $2$ `3/8` $+$ $3$ $-$ $4$ `1/6`

   $=$ $2$ `3/8` $+$ `3/1` $-$ `25/6` 

   $=$ `19/8` $+$ `24/8` $-$ `25/6`

   $=$ `43/8` $-$ `25/6` 

   $=$ `258/48` $-$ `200/48`

   $=$ `58/48`

   Xin hay nhất nè !

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