问题
解答题
计算: (1)-13-(1+0.5)×
(2)25×
|
答案
(1)原式=-1-
×3 2
×(-1 3
)1 4
=-1+
=-1 8
;7 8
(2)原式=25×
+25×3 4
+25×(-1 2
)1 4
=25×[
+3 4
+(-1 2
)]1 4
=25.
计算: (1)-13-(1+0.5)×
(2)25×
|
(1)原式=-1-
×3 2
×(-1 3
)1 4
=-1+
=-1 8
;7 8
(2)原式=25×
+25×3 4
+25×(-1 2
)1 4
=25×[
+3 4
+(-1 2
)]1 4
=25.