请写出过程,最好加解、原式(也可不加)(1) (-2又3/10)+(+3又3/5)(2)0+(-2006又1/4)(3)(-7)+(+6)+(+9)+(-4)(4)(-18.95)+(-7.25)+18.25+(+7又1/4)(5)|-1/4|+(-1/3)+5/6
问题描述:
请写出过程,最好加解、原式(也可不加)
(1) (-2又3/10)+(+3又3/5)
(2)0+(-2006又1/4)
(3)(-7)+(+6)+(+9)+(-4)
(4)(-18.95)+(-7.25)+18.25+(+7又1/4)
(5)|-1/4|+(-1/3)+5/6
答
原式 = (-2又3/10)+(+3又6/10)
= 1又3/10
原式 = -2006又1/4
原式 = (-7)+(-4)+(+6)+(+9)
= (-11) + (+15)
= 4
原式 =(-18.95)+18.25+(+7又1/4)+(-7.25)
= (-0.75)+0
= -0.75
原式 = |-1/4|+(-1/3)+5/6
= 1/4+(-1/3)+5/6
= 3/12+(-4/12)+10/12
= 9/12
= 3/4