1/2 ; 1/2 ; -1/2
180 = 22 x 32 x5
Ư<180> =<2,3,4,6,9,10,12,15,18,20>
dùng từ gợi ý để sếp các câu sau
1, My home land / to be /different / yours.
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2, she /usually / go / library / her free time
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3, ba / interested / collect / stamps
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