有理数的加减法)(1)(+12)+(-14)—(-62)—(+25)(2)5-(-7)+(-12)(3)(-17)-(-
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有理数的加减法)
(1)(+12)+(-14)—(-62)—(+25)
(2)5-(-7)+(-12)
(3)(-17)-(-32)+(-21)-(-12)
(4)(负3分之2)-(负2又4分之3)-(负2又三分之2)-(+3.75)
都说要写过程了……
(1)(+12)+(-14)—(-62)—(+25)
(2)5-(-7)+(-12)
(3)(-17)-(-32)+(-21)-(-12)
(4)(负3分之2)-(负2又4分之3)-(负2又三分之2)-(+3.75)
都说要写过程了……
![有理数的加减法)(1)(+12)+(-14)—(-62)—(+25)(2)5-(-7)+(-12)(3)(-17)-(-](/uploads/image/z/18836414-62-4.jpg?t=%E6%9C%89%E7%90%86%E6%95%B0%E7%9A%84%E5%8A%A0%E5%87%8F%E6%B3%95%EF%BC%89%EF%BC%881%EF%BC%89%EF%BC%88%2B12%EF%BC%89%2B%EF%BC%88-14%EF%BC%89%E2%80%94%EF%BC%88-62%EF%BC%89%E2%80%94%EF%BC%88%2B25%EF%BC%89%EF%BC%882%EF%BC%895-%EF%BC%88-7%EF%BC%89%2B%EF%BC%88-12%EF%BC%89%EF%BC%883%EF%BC%89%EF%BC%88-17%EF%BC%89-%EF%BC%88-)
(1).(+12)+(-14)—(-62)—(+25)
原式=12-14+62-25
=12+62-14-25
=35
(2)5-(-7)+(-12)
原式=5+7-12
=0
(3)(-17)-(-32)+(-21)-(-12)
原式=-17+32-21+12
=6
(4)(-2/3)-(-2 3/4)-(2 2/3)-(+3.75)
原式=-2/3+2 3/4-2 2/3-3.75
=1
原式=12-14+62-25
=12+62-14-25
=35
(2)5-(-7)+(-12)
原式=5+7-12
=0
(3)(-17)-(-32)+(-21)-(-12)
原式=-17+32-21+12
=6
(4)(-2/3)-(-2 3/4)-(2 2/3)-(+3.75)
原式=-2/3+2 3/4-2 2/3-3.75
=1