化简相反数①-[-(-2/3)] ②-[+(-1又1/3)]③-[-(-5/3)]④-{-[+(-2.5)]

问题描述:

化简相反数
①-[-(-2/3)] ②-[+(-1又1/3)]③-[-(-5/3)]④-{-[+(-2.5)]

1.-2/3;
2.1又1/3
3.5/3
4.-2.5

1、-2/3 2、4/3 3、-5/3 4、-2.5

①-[-(-2/3)]
=-[2/3]
=-2/3.
②-[+(-1又1/3)]
=-[-4/3]
=4/3,
③-[-(-5/3)]
=-[5/3]
=-5/3.
④-{-[+(-2.5)]
=-{-[-2.5]}
=-{2.5}
=-2.5

1. -2/3
2. 5/3
3. -5/3
4. -2.5