问题
解答题
计算题: (1)-3-(-4)+7; (2)8×(-
(3)(
(4)(-2)2-|-6|+2-3×(-
(5)4
|
答案
(1)原式=-3+4+7
=-3+11
=8;
(2)原式=-8×
÷164 5
=-8×
×4 5 1 16
=-
;2 5
(3)原式=-
×24+3 8
×24+1 6
×243 4
=-9+4+18
=13
(4)原式=4-6+2+1
=7-6
=1
(5)原式=
×[-9×9 2
+0.8]×(-1 9
)5 3
=
×[-1+0.8]×(-9 2
)5 3
=
×[-9 2
]×(-1 5
)5 3
=
.3 2