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12÷[(4.3-2.38)×25]=
[ ]
(3.6-1.2)×4.25-0.8=
A.10.2
B.54
C.10.89
D.9.4
12
[
A
B
C
D
(
口算.
(1)0.4
(2)3.7
(3)15.3
(4)4.6