\(a,156:4+244:4\\ =\left(156+244\right):4\\ =400:4\\ =100\)
\(b,224:8+576:8\\ =\left(224+576\right):8\\ =800:8\\ =100\)
\(c,768:6-168:6\\ =\left(768-168\right):6\\ =600:6\\ =100\)
156:4+244:4
= (156+244):4
= 400:4
= 100
224:8+576:8
= (224+576):8
= 800:8
=100
768:6-168:6
= (768-168):6
= 600:6
= 100