\[\boxed{\mathbf{976\ (966).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ a + b = - 6,3 + 2,7 = - 3,6\]
\[2)\ |a| + b = | - 6,3| + 2,7 =\]
\[= 6,3 + 2,7 = 9\]
\[3)\ a + |b| = - 6,3 + |2,7| =\]
\[= - 6,3 + 2,7 = - 3,6\]
\[4)\ |a + b| = | - 6,3 + 2,7| =\]
\[= | - 3,6| = 3,6\]
\[5)\ |a| + |b| = | - 6,3| + |2,7| =\]
\[= 6,3 + 2,7 = 9\]