Question

计算 (-3/4)+3又3/8+|-0.75|+(-5又1/2)+|-2又5/8|

Answer 1

(-3/4)+3又3/8+|-0.75|+(-5又1/2)+|-2又5/8|
=-0.75+0.75+3.375+2.675-5.5
=0+6-5.5
=0.5

Answer 2

（-3/4）=-3/4 +（-5又1/2）=-5又1/2 括号前是正号，打开括号括号内数符号不变
|-0.75|=0.75 |-2又5/8|=2又5/8 绝对值大于等于0
（-3/4）+3又3/8+|0.75|+（-5又1/2）+|2又5/8|
=-3/4+3又3/8+0.75-5又1/2+2又5/8
=-3/4+0.75+3又3/8-5又1/2+2又5/8
=-（5又1/2-3又3/8）+2又5/8通分化为同分母分数
=-（5又4/8-3又3/8）+2又5/8
=-2又1/8+2又5/8
=4/8
=1/2
=

Answer 3

(-3/4)+3又3/8+|-0.75|+(-5又1/2)+|-2又5/8|
=-0.75+0.75+3.375+2.675-5.5
=0+6-5.5
=0.5

Answer 4

(-3/4)+3又3/8+|-0.75|+(-5又1/2)+|-2又5/8|
=-0.75+0.75+3.375+2.675-5.5
=0+6-5.5
=0.5

Answer 5

解： (-3/4)+3又3/8+|-0.75|+(-5又1/2)+|-2又5/8|
=-3/4+3又3/8+3/4-5又1/2+2又5/8
=(-3/4+3/4)+(3又3/8+2又5/8)-5又1/2
=0+6-5又1/2
=1/2。