Arithmetic Operator Puzzles

#1825: 4 _ 4 _ 8 _ 1 = 3 easy #1826: 4 _ 4 _ 8 _ 2 = 1 easy #1827: 4 _ 4 _ 8 _ 3 = -1 easy #1828: 4 _ 4 _ 8 _ 4 = 8 easy #1829: 4 _ 4 _ 8 _ 5 = 7 easy #1830: 4 _ 4 _ 8 _ 5 = 10 easy #1831: 4 _ 4 _ 8 _ 6 = 8 medium #1832: 4 _ 4 _ 8 _ 6 = -4 medium #1833: 4 _ 4 _ 8 _ 6 = 12 medium #1834: 4 _ 4 _ 8 _ 7 = -5 medium #1835: 4 _ 4 _ 8 _ 7 = 14 medium #1836: 4 _ 4 _ 8 _ 8 = 10 medium #1837: 4 _ 4 _ 8 _ 8 = -6 medium #1838: 4 _ 4 _ 8 _ 9 = 11 hard #1839: 4 _ 4 _ 8 _ 9 = -7 hard #1840: 4 _ 4 _ 8 _ 2 = 17 hard #1841: 4 _ 4 _ 9 _ 3 = 16 hard #1842: 4 _ 4 _ 9 _ 6 = 10 medium #1843: 4 _ 4 _ 9 _ 3 = -8 hard #1844: 4 _ 4 _ 9 _ 3 = 19 hard #1845: 4 _ 4 _ 9 _ 9 = 17 hard #1846: 4 _ 4 _ 9 _ 9 = 15 hard #1847: 4 _ 5 _ 2 _ 6 = 19 hard #1848: 4 _ 5 _ 2 _ 4 = -6 easy #1849: 4 _ 5 _ 2 _ 2 = 19 hard #1850: 4 _ 5 _ 2 _ 1 = 9 easy #1851: 4 _ 5 _ 2 _ 3 = 13 easy #1852: 4 _ 5 _ 2 _ 3 = 7 easy #1853: 4 _ 5 _ 2 _ 4 = 6 easy #1854: 4 _ 5 _ 2 _ 5 = 15 medium #1855: 4 _ 5 _ 2 _ 5 = 5 easy #1856: 4 _ 5 _ 2 _ 6 = 4 easy #1857: 4 _ 5 _ 2 _ 7 = 17 hard #1858: 4 _ 5 _ 2 _ 7 = 3 easy #1859: 4 _ 5 _ 2 _ 8 = 18 hard #1860: 4 _ 5 _ 2 _ 9 = 19 hard #1861: 4 _ 5 _ 2 _ 9 = 1 easy #1862: 4 _ 5 _ 3 _ 6 = 14 medium #1863: 4 _ 5 _ 3 _ 9 = 19 hard #1864: 4 _ 5 _ 3 _ 6 = -6 easy #1865: 4 _ 5 _ 3 _ 3 = 19 hard #1866: 4 _ 5 _ 3 _ 6 = 10 easy #1867: 4 _ 5 _ 4 _ 8 = 14 hard #1868: 4 _ 5 _ 4 _ 2 = -6 easy #1869: 4 _ 5 _ 4 _ 8 = -6 medium #1870: 4 _ 5 _ 4 _ 4 = 19 hard #1871: 4 _ 5 _ 4 _ 8 = 10 easy #1872: 4 _ 5 _ 4 _ 2 = 10 easy