a. 15:( 12-15) +2 b. ( 726-38+124 ) – ( 124+ 726 ).

0 bình luận về “a. 15:( 12-15) +2 b. ( 726-38+124 ) – ( 124+ 726 ).”

1. $\text{a. 15 : ( 12-15 ) + 2}$

   $\text{= 15 : (-3) + 2}$

   `=-5 +2`

   `=-3`

   $\text{b. ( 726 – 38 + 124 ) – ( 124 + 726 )}$

   $\text{= 812 – 850}$

   `=-38 `

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2. `a) 15:(12-15)+2`

   `= 15 : (-3) + 2`

   `= -5 + 2`

   `=-3`

   `b) ( 726-38+124 ) – ( 124+ 726 )`

   `= 726-38+124- 124- 726 `

   `= ( 726 – 726 ) + ( 124-124)-38`

   `= 0+0-38`

   `= -38`

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