1/ 11.107+11.18-25.11 2/ 115-(-85)+53-(-500+53) 3/ (-18)+(-31)+98+|-18|+(-69 4/ 17.(15-16)+16(17-20) 5/ 15:(-176)+15.76+100+15

0 bình luận về “1/ 11.107+11.18-25.11 2/ 115-(-85)+53-(-500+53) 3/ (-18)+(-31)+98+|-18|+(-69 4/ 17.(15-16)+16(17-20) 5/ 15:(-176)+15.76+100+15”

1. `1)11.107+11.18-25.11`

   `=11.(107+18-25)`

   `=11.100`

   `=1100`

   `2)115-(-85)+53-(-500+53)`

   `=115+85+53-(-447)`

   `=115+85+53+447`

   `=(115+85)+(53+447)`

   `=200+500`

   `=700`

   `3)(-18)+(-31)+98+|-18|+(-69)`

   `=(-18)+(-31)+98+18+(-69)`

   `=[(-18)+18]+[(-31)+(-69)]+98`

   `=(-100)+98`

   `=-2`

   `4)17.(15-16)+16(17-20)`

   `=17.15-17.16+16.17-16.20`

   `=17.15-16.20`

   `=255-320`

   `=-65`

   `5)15.(-176)+15.76+100+15`

   `=15.(-176+76+1)+100`

   `=15.(-99)+100`

   `=-1485+100`

   `=-1385`

    

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2. 1/ 11.107+11.18-25.11

   = 1177 + 198 – 275

   = 1100

   2/ 115-(-85)+53-(-500+53)

   = 115 + 85 + 53 + 500 – 53

   =  700

   3/ (-18)+(-31)+98+|-18|+(-69)

   = 18 + (-31) + 98 + (-69)

    = -49 – 167

   = -118

   4/ 17.(15-16)+16(17-20)

   = 17.(-1)+16(-3)

   = -17 – 48

   = -65

   5/ 15:(-176)+15.76+100+15

   = $\frac{-15}{176}$ +1140 + 100 +15

   = 1254.914773

   ≈ 1254.9

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