Toán Lớp 7: (-4/15-18/19) – (20/19 + 11/15)
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Toán Lớp 7: (-4/15-18/19) – (20/19 + 11/15)
Comments ( 2 )
=-4/15-18/19-20/19-11/15
=(-4/15-11/15)+(-18/19-20/19)
=-15/15-38/19
=-1-2
=-3