问题
解答题
计算: (1)18-6÷(-2)×(-
(2)
(3)(
(4)-14÷(-5)2×(-
|
答案
(1)18-6÷(-2)×(-
)1 3
=18-3×1 3
=18-1
=17;
(2)
-2 3
-(-1 8
)+(-1 3
)3 8
=(
+2 3
)-(1 3
+1 8
)3 8
=1-1 2
=
;1 2
(3)(
-1 2
+5 9
-5 6
)×(-36)7 12
=
×(-36)-1 2
×(-36)+5 9
×(-36)-5 6
×(-36)7 12
=-18+20-30+21
=-7;
(4)-14÷(-5)2×(-
)+|0.8-1|5 3
=-1÷25×(-
)+5 3 1 5
=
+1 15 1 5
=
.4 15