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-28 + 12 * (-0,5)² - 6 * (-1/2)³ =
-28 + 12 * 0,25 - 6 * (-1/8) =
-28 + 3 + 6/8 =
-27 8/8 + 3 6/8 = - 24 2/8 = - 24 1/4
b)
-(-1/2)³ + (-0,4)³ : (1 1/5)² * 2 13/16 =
-(-1/8) + (- 4/10)³ : (6/5)² * 45/16 =
1/8 + (- 64/1000) : 36/25 * 45/16 =
1/8 + (-64/1000) * 25/36 * 45/16 =
1/8 + (-16/40) * 1/9 * 45/16 =
1/8 + (- 1/8) * 1/9 * 9/1 =
1/8 + ( -1/8) * 1/1 * 1/1 =
1/8 - 1/8 = 0
c)
-[-(-0,75)² + (1 1/4)²] - 4 * (-1/2)^4 =
-[-(0,5625) + (1,25)² ] - 4 * 1/16 =
-[-0,5625 + 1,5625] - 1 * 1/4 =
- 1 - 1/4 = - 1 1/4
d)
130 - [(-6)² * 4/3² - 3²/8 - (-0,5)³ ] : 4 2/7 =
130 - [ 36 * 4/9 - 9/8 - (-0,125) ] : 30/7 =
130 - [ 4 * 4/1 - 1,125 + 0,125 ] : 30/7 =
130 - [ 16 - 1] * 7/30 =
130 - 15 * 7/30 =
130 - 1 * 7/2 =
129 2/2 - 3 1/2 = 126 1/2