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3.2-3.2×0.5=
[ ]
A.4
B.1.6
C.49.6
D.1
2.4-2.4×0.5=
A.1.2
B.1.4
C.0.3
D.10
2.2+7.8-1.4=
A.5.5
B.8.6
D.3
3.2
[
A
B
C
D
2.4