a=+12,b=-7,c=(┃-19┃-┃-8┃),求:a+┃-c┃+┃b┃的值.
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a=+12,b=-7,c=(┃-19┃-┃-8┃),求:a+┃-c┃+┃b┃的值.
a=+12,b=-7,c=(┃-19┃-┃-8┃),求:a+┃-c┃+┃b┃的值.
a=+12,b=-7,c=(┃-19┃-┃-8┃),求:a+┃-c┃+┃b┃的值.
a=12,|b|=7,c=11,-c=-11,原式= 12+7+(-11)=8