1/ 32.( -39) + 16.( –22)
\(=2.16.\left(-39\right)+16.\left(-22\right)\)
\(=16.\left[2.\left(-39\right)+\left(-22\right)\right]\)
\(=16.\left[\left(-78\right)+\left(-22\right)\right]\)
\(=16.\left(-100\right)\)
\(=-1600\)
2/ 44.( –36) + 22.( –28)
\(=2.22.\left(-36\right)+22.\left(-28\right)\)
\(=22\left[2.\left(-36\right)+\left(-28\right)\right]\)
\(=22.\left[\left(-72\right)+\left(-28\right)\right]\)
\(=22.\left(-100\right)\)
\(=-2200\)