有理数计算:(-20)-(+5)-(-5)-(-12)

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有理数计算:(-20)-(+5)-(-5)-(-12)

有理数计算:(-20)-(+5)-(-5)-(-12)
有理数计算:(-20)-(+5)-(-5)-(-12)

有理数计算:(-20)-(+5)-(-5)-(-12)
(-20)-(+5)-(-5)-(-12)
=-20-5+5+12
=12-20
=-8

-32

-8

(-20)-(+5)-(-5)-(-12)
=-25+5+12
=-20+12
=-8

—8