有理数的加减混合计算题.(要有计算过程)(1)4.6-2.5-(-11.2)(2)(-6分之5)+28.7+(-6分之1)(3)-3分之2-3分之2+(-2)(4)3分之2-5分之3+3(5)(-7分之5)-(-7分之3)+1(6)11又2分1-1又4
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![有理数的加减混合计算题.(要有计算过程)(1)4.6-2.5-(-11.2)(2)(-6分之5)+28.7+(-6分之1)(3)-3分之2-3分之2+(-2)(4)3分之2-5分之3+3(5)(-7分之5)-(-7分之3)+1(6)11又2分1-1又4](/uploads/image/z/635203-19-3.jpg?t=%E6%9C%89%E7%90%86%E6%95%B0%E7%9A%84%E5%8A%A0%E5%87%8F%E6%B7%B7%E5%90%88%E8%AE%A1%E7%AE%97%E9%A2%98.%EF%BC%88%E8%A6%81%E6%9C%89%E8%AE%A1%E7%AE%97%E8%BF%87%E7%A8%8B%EF%BC%89%EF%BC%881%EF%BC%894.6-2.5-%EF%BC%88-11.2%EF%BC%89%EF%BC%882%EF%BC%89%EF%BC%88-6%E5%88%86%E4%B9%8B5%EF%BC%89%2B28.7%2B%EF%BC%88-6%E5%88%86%E4%B9%8B1%EF%BC%89%EF%BC%883%EF%BC%89-3%E5%88%86%E4%B9%8B2-3%E5%88%86%E4%B9%8B2%2B%EF%BC%88-2%EF%BC%89%EF%BC%884%EF%BC%893%E5%88%86%E4%B9%8B2-5%E5%88%86%E4%B9%8B3%2B3%EF%BC%885%EF%BC%89%EF%BC%88-7%E5%88%86%E4%B9%8B5%EF%BC%89-%EF%BC%88-7%E5%88%86%E4%B9%8B3%EF%BC%89%2B1%EF%BC%886%EF%BC%8911%E5%8F%882%E5%88%861-1%E5%8F%884)
有理数的加减混合计算题.(要有计算过程)(1)4.6-2.5-(-11.2)(2)(-6分之5)+28.7+(-6分之1)(3)-3分之2-3分之2+(-2)(4)3分之2-5分之3+3(5)(-7分之5)-(-7分之3)+1(6)11又2分1-1又4
有理数的加减混合计算题.(要有计算过程)
(1)4.6-2.5-(-11.2)
(2)(-6分之5)+28.7+(-6分之1)
(3)-3分之2-3分之2+(-2)
(4)3分之2-5分之3+3
(5)(-7分之5)-(-7分之3)+1
(6)11又2分1-1又4分之3-1又4分之1+4又2分之1
(7)(-6)+0.5-(-8)+4
(8)(-3分之1)+2分之1+4分之1-3分之2
有理数的加减混合计算题.(要有计算过程)(1)4.6-2.5-(-11.2)(2)(-6分之5)+28.7+(-6分之1)(3)-3分之2-3分之2+(-2)(4)3分之2-5分之3+3(5)(-7分之5)-(-7分之3)+1(6)11又2分1-1又4
(1)4.6-2.5-(-11.2)
= 4.6-2.5+11.2
= 2.1+11.2
= 13.3
(2)原式=-6分之5+28.7-6分之1
=28.7-1
=27.7
(3)原式=-3分之4-2
=-2又
3分之4
(4)原式=15分之10-15分之9+3
=15分之1+3
=3又15分之1
(5)原式=-7分之5+7分之3+3
=-7分之2+3
=2又7分之5
(6)原式=11又2分之1+4又2分之1-1又4分之3-1又4分之1
=16-3
=13
(7)原式=4+0.5+8 -6
=12.5-6
=6.5
(8)原式=2分之1+4分之1-3分之1-3分之2
=4分之3-1
=-0.25
?不懂
(1)4.6-2.5-(-11.2)
=2.1+11.2
=13.3
(2)(-5/6)+28.7+(-1/6)
=[(-5/6)+(-1/6)]+28.7
=-1+28.7=29.7
(3)-2/3-2/3+(-2)
=-2/3+(-2/3)+(-2)
...
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(1)4.6-2.5-(-11.2)
=2.1+11.2
=13.3
(2)(-5/6)+28.7+(-1/6)
=[(-5/6)+(-1/6)]+28.7
=-1+28.7=29.7
(3)-2/3-2/3+(-2)
=-2/3+(-2/3)+(-2)
=-7/3
(4)2/3-3/5+3
=1/15+3
=46/15
(5)(-5/7)-(-3/7)+1
=(-5/7)+3/7+1
=5/7
(6)11 1/2-1 3/4-1 1/4+4 1/2
=(23/2+9/2)-(7/4+5/4)
=16-3=13
(7)(-6)+0.5-(-8)+4
=(-6)+0.5+8+4
=-5.5+12=6.5
(8)(-1/3)+1/2+1/4-2/3
=[(-1/3)+(-2/3)]+1/2+1/4
=-1+3/4=-1/4
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