Question

tính

/-28/+(129-182+99)-(129+199-182)

 

Answer 1

    /-28/ + (129 - 182 + 99) - (129 + 199 - 182)

= 28 + 129 - 182 + 99 - 129 - 199 + 182

= 129 - 129 + 182 - 182 + 99 - 199 + 28

= 0 + 0 + (-100) + 28

= -72

Answer 2

\(\left|-28\right|+\left(129-182+99\right)-\left(129+199-182\right)\)

\(=28+129-182+99-129-199+182\)

\(=28+129+\left(-182\right)+99+\left(-129\right)+\left(-199\right)+182\)

\(=\text{ }\left[129+\left(-129\right)\right]+\text{ }\left[\left(-182\right)+182\right]+\text{ }\left[99+\left(-199\right)\right]+28\)

\(=0+0+\left(-100\right)+28\)

\(=\left(-100\right)+28\)

\(=-72\)