Toán Lớp 6: (-10)+(-9)+(-8)……..+8+9+10+11
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Toán Lớp 6: (-10)+(-9)+(-8)……..+8+9+10+11
Comments ( 2 )
(-10)+(-9)+(-8)+……..+8+9+10+11
=[(-10)+10]+[(-9)+9]+[(-8)+8]+….+11
=0+0+0+0+0+0+0+0+0+0+11
=11
(-10)+(-9)+(-8)……..+8+9+10+11
=[(-10)+10]+[(-9)+9]+[(-8)+8]+….+11
=0+0+0+…+11
=11
-> Công thức số đối