15+(-1/4)-15-(-0.25) 8-2×3 3-(-0.25)-2-12-(-1/3-1/4+1/2)要写解 要写递等式计算

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15+(-1/4)-15-(-0.25) 8-2×3 3-(-0.25)-2-12-(-1/3-1/4+1/2)要写解 要写递等式计算
15+(-1/4)-15-(-0.25) 8-2×3 3-(-0.25)
-2-12-(-1/3-1/4+1/2)
要写解 要写递等式计算

15+(-1/4)-15-(-0.25) 8-2×3 3-(-0.25)-2-12-(-1/3-1/4+1/2)要写解 要写递等式计算
(1)原式=(15-15)-(1/4-0.25)
=0-0
=0
(2)原式=8-66+0.25
=-58+0.25
=-57.75
(3) 原式=-2-12-(-4-3+6)/12
=-2-12-(-1/12)
=-2-12+1/12
=-167/12