问题
解答题
计算: (1)-|-18
(2)(-2×5)3-(-1
(3)
(4)-14-(1-0.5)×(
|
答案
(1)原式=-18
+433 4
-131 2
+701 3 1 2
=(43
+701 2
)-(181 2
+133 4
)1 3
=114-(18+13)-(
+3 4
)1 3
=114-31-13 12
=83-13 12
=81
;11 12
(2)原式=(-10)3-(-
)×16 9
-(-10)29 16
=(-10)2(-10-1)+1
=-1100+1
=-1009;
(3)原式=
+2 3
+2.8+5 6
-1 3
+14 5 5 6
=(
+2 3
)+(1 3
+5 6
)+2.8-5 6 14 5
=1+
+5 3
-14 5 14 5
=
;8 3
(4)原式=-1-
×1 2
÷[-2-9]4 9
=-1-
×(-2 9
)1 11
=-1+2 99
=-
.97 99