\((1)\)在“\(-1\),\(-0.3\),\(\dfrac{1}{3}\),\(0\),\(-3.3\)”这五个数中,负分数的个数有________个.
\((2)\)如图\(∠1=82^{\circ}\),\(∠2=98^{\circ}\),\(∠3=80^{\circ}\),则\(∠4=\)________度.
\((3)\)一张桌子上摆放有若干个大小、形状完全相同的碟了,现从三个方向看,其三种视图如图所示,则这张桌了上碟了的总数为________.
\((4)\)已知\(A\),\(B\),\(C\)是数轴上的三个点,点\(A\),\(B\)表示的数分别是\(1\),\(3\),如图所示\(.\)若\(BC=2AB\),\(P\)为\(AC\)的中点,则点\(P\)表示的数是________.
\((5)\)定义:\(a\)是不为\(1\)的有理数,我们把\(\dfrac{1}{1-a}\)称为\(a\)的差倒数\(.\)如:\(2\)的差倒数是\(\dfrac{1}{1-2}=-1\),\(-1\)的差倒数是\(\dfrac{1}{1-(-1)}=\dfrac{1}{2}.\)已知\(a_{1}=-5\),\(a_{2}\)是\(a_{1}\)的差倒数,\(a_{3}\)是\(a_{2}\)的差倒数,\(a_{4}\)是\(a_{3}\)的差倒数,\(…\),依此类推,则\(a_{2018}=\)________.