sda3パーティションに残りのスペースがありますか？

合計スペースはsda380.2GiB（29.8 + .218 + 3.7 + 30 + 6.3 = 70.018）残りの80.2 -70.018 = 10.182GBを理解していません。

[root@centos ~]# df -hT
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs        30G  6.0G   24G  21% /
devtmpfs                devtmpfs  7.7G     0  7.7G   0% /dev
tmpfs                   tmpfs     7.8G   43M  7.7G   1% /dev/shm
tmpfs                   tmpfs     7.8G   18M  7.7G   1% /run
tmpfs                   tmpfs     7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/mapper/centos-home xfs        30G   21G  9.3G  70% /home
/dev/mapper/centos-var  xfs       6.3G  3.7G  2.7G  58% /var
/dev/mapper/centos-boot xfs       221M  175M   47M  80% /boot
tmpfs                   tmpfs     1.6G   32K  1.6G   1% /run/user/1000
/dev/sdb5               vfat       29G  757M   29G   3% /run/media/mukesh/SANDISK
/dev/sdc1               fuseblk   2.8T  269G  2.5T  10% /run/media/mukesh/Elements
/dev/sda6               fuseblk   199G  121G   78G  62% /run/media/mukesh/Local Disk SSD
/dev/sda5               fuseblk   119G  109G   10G  92% /run/media/mukesh/Local Disk SSD1
/dev/sda2               fuseblk    70G   59G   12G  84% /run/media/mukesh/Local Disk SSD2

fdisk /dev/sda出力：

Command (m for help): p

Disk /dev/sda: 500.1 GB, 500107862016 bytes, 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x5a508cde

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      206847      102400    7  HPFS/NTFS/exFAT
/dev/sda2          208896   145287167    72539136    7  HPFS/NTFS/exFAT
/dev/sda3       145287168   313476344    84094588+  83  Linux
/dev/sda4       313476345   976771071   331647363+   f  W95 Ext'd (LBA)
/dev/sda5       313476408   561230774   123877183+   7  HPFS/NTFS/exFAT
/dev/sda6       561231872   976771071   207769600    7  HPFS/NTFS/exFAT

vgdisplay -v出力

    Using volume group(s) on command line.
  --- Volume group ---
  VG Name               centos
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  6
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                5
  Open LV               5
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               70.02 GiB
  PE Size               4.00 MiB
  Total PE              17926
  Alloc PE / Size       17925 / 70.02 GiB
  Free  PE / Size       1 / 4.00 MiB
  VG UUID               DLdDuG-mytg-aMZs-OaJ3-CRzG-2z4r-sp5Btf

  --- Logical volume ---
  LV Path                /dev/centos/boot
  LV Name                boot
  VG Name                centos
  LV UUID                Q2XDnm-UxsM-XY0q-BbR1-6tOD-zLKu-1Jduhk
  LV Write Access        read/write
  LV Creation host, time localhost, 2016-03-03 22:26:22 +0530
  LV Status              available
  # open                 1
  LV Size                224.00 MiB
  Current LE             56
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

  --- Logical volume ---
  LV Path                /dev/centos/root
  LV Name                root
  VG Name                centos
  LV UUID                R4x09z-Mt0a-T9TW-VIEj-bfNX-Lf5G-lpJYhP
  LV Write Access        read/write
  LV Creation host, time localhost, 2016-03-03 22:26:22 +0530
  LV Status              available
  # open                 1
  LV Size                29.80 GiB
  Current LE             7628
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

  --- Logical volume ---
  LV Path                /dev/centos/home
  LV Name                home
  VG Name                centos
  LV UUID                9mkF24-VeHW-luVs-UF62-yQTG-3Lj0-6tgx6m
  LV Write Access        read/write
  LV Creation host, time localhost, 2016-03-03 22:26:23 +0530
  LV Status              available
  # open                 1
  LV Size                30.00 GiB
  Current LE             7679
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:3

  --- Logical volume ---
  LV Path                /dev/centos/var
  LV Name                var
  VG Name                centos
  LV UUID                pmsJiw-HqoT-dqyi-XaEc-JT8v-bU07-hf16Xn
  LV Write Access        read/write
  LV Creation host, time localhost, 2016-03-03 22:26:23 +0530
  LV Status              available
  # open                 1
  LV Size                6.28 GiB
  Current LE             1608
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:4

  --- Logical volume ---
  LV Path                /dev/centos/swap
  LV Name                swap
  VG Name                centos
  LV UUID                rdlDnE-t62f-LMAo-l4ao-GkDq-6Iy9-sJ7BIm
  LV Write Access        read/write
  LV Creation host, time localhost, 2016-03-03 22:26:23 +0530
  LV Status              available
  # open                 2
  LV Size                3.73 GiB
  Current LE             954
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:2

  --- Physical volumes ---
  PV Name               /dev/sda3     
  PV UUID               Iw7LYC-j6Bz-P1Lw-uqCz-kc0W-dElK-rqsQoI
  PV Status             allocatable
  Total PE / Free PE    17926 / 1