Сложение и вычитание десятичных дробей.

1) 19.4 + 7.23 = 26.63; 2) 3.54 - 1.4 = 2.14; 3) 6.4 + 2.85 = 9.25; 4) 6 - 3.82 = 2.18; 5) 8.314 - 1.2036 = 7.1104; 6) 4.24 + 8.36 = 12.6; 7) 8.34 - 3.205 = 5.135; 8) 24.541 + 1.55 = 26.091; 9) 285.874 - 3.96 = 281.914.