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Câu 1: (Chương 1/bài 1/ mức 1)
 !
"#
$%&%
'%%
(%)* +%
,%-./"0%
12324'
Câu 2: (Chương 1/bài 1/ mức 1)
56 7
8
 !6 7"#
$%09%
'%.9%
(%)* +%
,%-./"0%
12324$
Câu 3: (Chương 1/bài 1/ mức 1)
:56 70; !6 7"#