[tex](845 - 45) \div 100 = 8 \\( 845 - 145) \div 100 = 7 \\ (27 - 10) \div 17 = 1 \\ 8 \times 5 + 3 = 43 \\ (2 \times 3 \times 5 \times 6) \div 10 = 180 \div 10 = 18 \\ (364 + 48 \div 6) \div 17 = 371 \div 17 =da \: cu \:virgula \\ 66 \div 11 + 2 \times 7 = 6 + 14 = 20 \\ (44 + 19) \div 7 + 12 = 63 \div 7 + 12 = 21[/tex]