a/ ( 59 – 148 ) + 148 b/ ( – 2019 ) – ( 332 – 2019 ) c/ ( 88 – 117 ) + ( 117 – 288 ) d/ ( 39 – 87 + 40 ) – ( 39 – 60 – 87 ) e/ ( – 2020 ) + ( 246 + 20

0 bình luận về “a/ ( 59 – 148 ) + 148 b/ ( – 2019 ) – ( 332 – 2019 ) c/ ( 88 – 117 ) + ( 117 – 288 ) d/ ( 39 – 87 + 40 ) – ( 39 – 60 – 87 ) e/ ( – 2020 ) + ( 246 + 20”

1. (59-148)+148

   =59-148+148

   =59

   (-2019)-(332-2019)

   =-2019-332+2019

   =-332

   (88-117)+(117-288)

   =88-117+117-288

   =-200

   (39-87+40)-(39-60-87)

   =39-87+40-39+60+87

   =100

   (-2020)+(246+2020)

   =-2020+246+2020

   =246

   1416-(-19+1416)

   =1416+19-1416

   =19

   (-278)+(-56+278-44)

   =-278-56+278-44

   =-100

   Học tốt nhé! ^^

   Trả lời

2. Đáp án:

    

   Giải thích các bước giải:

    a) ( 59 – 148 ) + 148

   = 59 – 148 + 148

   = 55 – ( 148 – 148 )

   = 55 – 0

   = 55

   b) ( -2019 ) – ( 332 – 2019 )

   = -2019 – 332 + 2019

   = ( -2019 + 2019 ) – 332

   = 0 – 332

   = -332

   c) ( 88 – 117 ) + ( 117 – 288 )

   = 88 – 117 + 117 – 288

   = ( 88 – 288 ) – ( 177 – 177 )

   = -200 – 0

   = -200

   d) ( 39 – 87 + 40 ) – ( 39 -60 -87 )

   = 39 – 87 + 40 – 39 + 60 + 87

   = ( 39 – 39 ) – ( 87 – 87 ) + 40

   = 0 – 0 + 40

   = 40

   e) ( -2020 ) + ( 246 + 2020 )

   =-2020 + 246 + 2020

   = ( -2020 + 2020 ) + 246

   = 0 + 246

   = 246

   g) 1416 – ( -19 + 1416 )

   = 1416 + 19 – 1416

   = ( 1416 – 1416 ) + 19

   = 0 + 19

   = 19

   h) ( -278 ) + ( -56 + 278 – 44 )

   = -278 + ( -56 ) + 278 -44

   = ( -278 + 278 ) + ( -56 – 44 )

   = 0 + ( -100 )

   = -100

   Trả lời