问题
解答题
计算: (1)14-(-12)-17+(-25) (2)(-8)÷
(3)(-1)2009+(-3)×|-
|
答案
(1)原式=14+12-17-25=-16;
(2)原式=-8×
×(-3 2
)×(-3 2
)=-8×(-1 9
)×(-9 4
)=-2;1 9
(3)原式=-1-3×
-4×4=-1-2 9
-16=-172 3
.2 3
计算: (1)14-(-12)-17+(-25) (2)(-8)÷
(3)(-1)2009+(-3)×|-
|
(1)原式=14+12-17-25=-16;
(2)原式=-8×
×(-3 2
)×(-3 2
)=-8×(-1 9
)×(-9 4
)=-2;1 9
(3)原式=-1-3×
-4×4=-1-2 9
-16=-172 3
.2 3