问题
解答题
(1)
(2)(-72)-25; (3)-
(4)(
(5)[1-|-
|
答案
(1)原式=
-2 5
=1 5
.1 5
(2)原式=-97.
(3)原式=-
+1 2
-6 5
+5 2
-23 5
=27 5
-3=-22 5
.3 5
(4)原式=(
+6 12
-8 12
-9 12
)×(-24)=(-11 12
)×(-24)=12.6 12
(5)原式=(1-
)÷(3+3)=6 7
×1 7
=1 6
.1 42