1+1-1+1-1x20000000
=1+1-1+1-20000000
=2-1+1-20000000
=1+1-20000000
=2-20000000
=-19999998
tk nhe
1+1-1+1-1x20000000=...
1+1-1+1-1x20000000
=1+1-1+1-20000000
=2-1+1-20000000
=1+1-20000000
=2-20000000
=-19999998
20000000 nhe h dung nha se duoc may man ca nam
1+1-1+1-1x20000000
=2-20000000
= -19999998
1 + 1 - 1 + 1 - 1 x 20000000
= 1 + 1 - 1 + 1 - 20000000
= 2 - 1 + 1 - 20000000
= 1 + 1 - 20000000
= 2 - 20000000
= -19999998
1 + 1 - 1 + 1 - 1 x 20000000 = 20000000
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