Toán Lớp 6: (-89) + (-51) + 99 + (-37) + 61 + (-23) + 47 + 33
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Toán Lớp 6: (-89) + (-51) + 99 + (-37) + 61 + (-23) + 47 + 33
Comments ( 2 )
=[(-89)+99]+[(-51)+61]+[(-37)+(-23)]+[47+33]
=10 +10 +-60 +80
=20+(-60)+80
=-40+80
=40