问题
解答题
计算: (1)(-3)2-(-3)3-22+(-22) (2)3.25-[(-
(3)(-4)÷(-3)×45÷(-5) (4)(-
|
答案
(1)原式=9-(-27)-4+(-4)
=9+27-4-4
=28;
(2)原式=3
-[(-1 4
)+(+1 2
)+(-5 2
)+45 8
]2 3
=3
-[2-1 4
+45 8
]2 3
=3
-51 4 25 24
=3
-56 24 25 24
=-2
;19 24
(3)原式=(-4)×(-
)×45×(-1 3
)1 5
=-4×
×45×1 3 1 5
=-12;
(4)原式=(-
)×3 4
×(-3 8
)×16 9 1 8
=
.1 16