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\[\,\,\,45.{\rm{ }}\left( { - 24} \right){\rm{ }} + {\rm{ }}\left( { - 10} \right).\left( { - 12} \right)\] \[ = {\rm{ }}45.{\rm{ }}\left( { - 24} \right){\rm{ }} + {\rm{ }}\left( { - 5} \right).2\left( { - 12} \right)\] \[ = {\rm{ }}45.{\rm{ }}\left( { - 24} \right){\rm{ }} + {\rm{ }}\left( { - 5} \right).\left( { - 24} \right)\]
\[ = {\rm{ }}\left( { - 24} \right).\left( {{\rm{ }}45 - 5} \right)\;\] \[ = {\rm{ }}\left( { - 24} \right).{\rm{ }}40\] \[ = {\rm{ }} - {\rm{ }}960\]
