1.
\((1)\)近似数\(1.5×10^{6}\)精确到_____位.
\((2)\)当\(m-2n=4\),求代数式\((m-2n)^{2}+2(2n-m)-1\)的值为______.
\((3)8\)点\(55\)分时,钟表上时针与分针的所成的角是__________.
\((4)\)某商品按进价提高\(40\%\)后标价,再打\(8\)折销售,售价为\(1120\)元,则这种电器的进价为______元.
\((5)\)有一组数满足\(a_{1}=1\),\(a_{2}=2\),\(a_{3}-a_{1}=0\),\(a_{4}-a_{2}=2\),\(a_{5}-a_{3}=0\),\(a_{6}-a_{4}=2\)\(……\)按此规律进行下去,则\({{a}_{1}}+{{a}_{2}}+{{a}_{3}}+\cdots +{{a}_{100}}\)\(=\)________.