Bỏ ngoặc rồi tính : a)30+(-59-15) b) -22+(16-41) c) -(76-35)+27 d) (40-80)-21 e) -(33-60)+48 f) 15-(35-70) g) 18-(-90-30) h) 26-(100-150) Nhanh hộ m

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1. a)30+(-59-15)

   = 30 – 59 – 15

   = -44

   b) -22+(16-41)

   = -22 + 16 – 41 

   = -47 

   c) -(76-35)+27

   = -76 + 35 + 27

   = -14

   d) (40-80)-21

   = 40 – 80 – 21

   = -61

   e) -(33-60)+48

   = -33 + 60 + 48 

   = 75

   f) 15-(35-70)

   = 15 – 35 + 70

   = 50

   g) 18-(-90-30)

   = 18 + 90 + 30 

   = 138

   h) 26-(100-150)

   = 26 – 100 + 150

   = 76

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2. $\text{a)30 + ( – 59 – 15 ) }$

   $\text{ = 39 – 59 – 15  }$

   $\text{ = – 44 } $

   $\text{b) – 22 + ( 16 – 41 ) }$

   $\text{ = – 22 + 16 – 41 }$

   $\text{ = – 47 }$

   $\text{c) – ( 76 – 35 ) + 27}$

   $\text{= – 76 + 35 + 27 }$

   $\text{= – 41 + 27 }$

   $\text{ = – 14 }$

   $\text{d) ( 40 – 80 )- 21}$

   $\text{= 40 – 80 – 21}$

   $\text{= – 40 – 21 }$

   $\text{ = – 61 }$

   $\text{e) – (33 – 60 ) + 48}$

   $\text{= – 33 – 60 + 48 }$

   $\text{ = 75 }$

   $\text{f) 15 – ( 35 – 70 ) }$

   $\text{ = 15 – 35 + 70 }$

   $\text{ = – 20 + 70 }$

   $\text{ = 50 }$

   $\text{g) 18 – ( – 90 – 30 ) }$

   $\text{= 18 + 90 + 30 }$

   $\text{ = 18 + 120 }$

   $\text{ = 138 }$

   $\text{h) 26 – ( 100 – 150 ) }$

   $\text{= 26 – 100 + 150 }$

   $\text{ = – 74 + 150 }$

   $\text{ = 76 }$

    

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