Question

Найдите значение выражения а-(b-c) если:. 1)а=5,6;b=7,6;c=-4,8; 2)a=52,3;b=-18,9;c=24,5; 3)a=-5/6;b=-7/9;c=-5/8 ; 4)a=-7целых 3/16;b=2целых 1/8;с=-7целых 7/12

Answer 1

Ответ:

1) a - (b - c) = 5.6 - (7.6 - (-4.8)) = 5.6 - (7.6 + 4.8) = 5.6 - 12.4 = -6.8

2) a - (b - c) = 52.3 - (-18.9 - 24.5) = 52.3 - (-43.4) = 52.3 + 43.4 = 95.7

3) a - (b - c) = -5/6 - (-7/9 - (-5/8)) = -5/6 - (-7/9 + 5/8) = -5/6 - (-56/72 + 45/72) = -5/6 - (-11/72) = -5/6 + 11/72 = -55/72

4) a - (b - c) = -7 3/16 - (2 1/8 - (-7 7/12)) = -7 3/16 - (2 1/8 + 7 7/12) = -7 3/16 - (2 8/8 + 7 14/12) = -7 3/16 - (10 22/12) = -7 3/16 - (10 11/6) = -7 3/16 - (16 22/6) = -7 3/16 - (16 11/3) = -7 3/16 - (49 33/48) = -7 3/16 - 49 33/48 = -56 51/16 - 49 33/48 = -106 19/48