Paul volunteered at the senior center for
3
9
10

3910
hours on Saturday and
5
1
6

516
hours on Sunday.
How many hours did Paul volunteer altogether at the senior center?

A.
3
9
10

+
5
1
6

=
3
27
30

+
5
5
30

=
8
32
30

=
9
2
30

=
9
1
15

3910+516=32730+5530=83230=9230=9115
hours

B.
3
9
10

+
5
1
6

=
8
+
9
10

+
1
6

=
8
10
16

3910+516=8+910+16=81016
hours

C.
3
9
10

+
5
1
6

=
3
27
30

+
5
2
30

=
8
29
30

3910+516=32730+5230=82930
hours

D.
3
9
10

+
5
1
6

=
3
27
30

+
5
5
30

=
8
32
30

=
8
2
30

=
8
1
15

3910+516=32730+5530=83230=8230=8115
hours