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1. จงทําให้เป็นผลสําเร็จ
�. 1� - �
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�. (-1�) � (-�)
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�. �1 � (-8)
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�. (-1�) - 1�
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�. �1� � (-3)� - �
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�. จงหา��า��ง a � b �ล� b � a เ�����ําหน� a �ล� b ��ง����ปน��
�. a = 7, b = (-5)
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�. a = (-1�), b = (-8)
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3. a = (-7), b = (-5)
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26 คณิตศาสตร์ ระดับมัธยมศึกษาตอนต้น : พค21001
ส�ำนักงำน กศน.จังหวัดกำฬสินธุ์
