1). 25 + 37 – 48 – 25 – 37 2). 2575 + 37 – 2576 – 29 3). 34 + 35 +36 + 37 – 14 – 15 – 16 – 17

0 bình luận về “1). 25 + 37 – 48 – 25 – 37 2). 2575 + 37 – 2576 – 29 3). 34 + 35 +36 + 37 – 14 – 15 – 16 – 17”

1. Đáp án+Giải thích các bước giải:

   `1,25+37-48-25-37`

   `=25-25+37-37-48`

   `=0-0-48`

   `=-48`

   `2,2575+37-2576-29`

   `=2576-2576+29-29+5`

   `=5`

   `3,34+35+36+37-14-15-16-17`

   `=34-14+35-15+36-16+37-17`

   `=20+20+20+20`

   `=80`

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2. a) 25 + 37 – 48 – 25 – 37

   = 25 – 25 + 37 – 37 – 48

   = 0 + 0 – 48 = -48

   b) 2575 + 37 – 2576 – 29

   = 2575 – 2575 – 1 – 29 + 37

   = 0 – 30 + 37 = 7

   c) 34 + 35 +36 + 37 – 14 – 15 – 16 – 17

   = 34 – 14 + 35 – 15 + 36 – 16 + 37 – 17

   = 20 + 20 + 20 + 20 = 80

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