Question

1. \(\left( { - 12,245} \right) + \left( { - 8,235} \right)\)

2. \(\left( { - 8,451} \right) + 9,79\)

3. \(\left( { - 11,254} \right) - \left( { - 7,35} \right)\)

Answer 1

1, \(\begin{array}{l}\left( { - 12,245} \right) + \left( { - 8,235} \right)\\ =  - \left( {12,245 + 8,235} \right)\\ =  - 20,48\end{array}\)

2, \(\begin{array}{l}\left( { - 8,451} \right) + 9,79\\ = 9,79 - 8,451\\ = 1,339\end{array}\)

3, \(\begin{array}{l}\left( { - 11,254} \right) - \left( { - 7,35} \right)\\ = \left( { - 11,254} \right) + 7,35\\ =  - \left( {11,254 - 7,35} \right)\\ =  - 3,904\end{array}\)