计算题: (1)-4.27+3.8-0.73+1.2 (2)2-22×2-3×(-1)2013 (3)25×
(4)-24-
|
(1)原式=(-4.27-0.73)+(3.8+1.2)
=-5+5
=0;
(2)原式=2-4×2-3×(-1)
=2-8+3
=-3;
(3)原式=25×(
+3 4
-1 2
)1 4
=25×0
=0;
(4)原式=-16-
×(5-9)1 2
=-16-
×(-4)1 2
=-16+2
=-14.
计算题: (1)-4.27+3.8-0.73+1.2 (2)2-22×2-3×(-1)2013 (3)25×
(4)-24-
|
(1)原式=(-4.27-0.73)+(3.8+1.2)
=-5+5
=0;
(2)原式=2-4×2-3×(-1)
=2-8+3
=-3;
(3)原式=25×(
+3 4
-1 2
)1 4
=25×0
=0;
(4)原式=-16-
×(5-9)1 2
=-16-
×(-4)1 2
=-16+2
=-14.