3+5=?
A.1
B.2
D.3
S.8
20+20=?
A.50
B.30.
D.40
C.20
100+50=?
A.140
B.130
D.120
C.150
7+7=?
A.10
B.14
D.13
C.11
50+30=?
A.40
B.80
D.70
C.90
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