问题
解答题
计算: (1)-23÷
(2)[1-(1-0.5×
(3)-|-3+2
(4)-22×(-3.14)-3.14×(-
(5)(
|
答案
(1)-23÷
×(-4 9
)22 3
=-8×
×9 4 4 9
=-8;
(2)[1-(1-0.5×
)]×[2-(-3)2]1 3
=[1-(1-
)]×[2-9]1 6
=[1-
]×[-7]5 6
=
×[-7]1 6
=-
;7 6
(3)-|-3+2
|-|-1 3
|2+(-1 3
)2×(-1)9×(-2)31 3
=-
-2 3
+1 9
×(-1)×(-8)1 9
=-
-2 3
+1 9 8 9
=
;1 9
(4)-22×(-3.14)-3.14×(-
)×(-6)1 2
=-4×(-3.14)-3.14×3
=(4-3)×3.14
=1×3.14
=3.14;
(5)(
-7 4
-7 8
)÷(-7 12
)+(-7 8
)8 3
=(
-7 4
-7 8
)×(-7 12
)+(-8 7
)8 3
=(-
×7 4
+8 7
×7 8
+8 7
×7 12
)+(-8 7
)8 3
=-2+1+
-2 3
)8 3
=-3.