问题
解答题
计算下列各题: (1)-24-(3+12) (2)5
(3)(-3
(4)
|
答案
(1)原式=-24-15=-39;
(2)原式=5
-21 5
-(-4.8)+(-41 6
)5 6
=5
-21 5
+41 6
-44 5 5 6
=(5
+41 5
)-(44 5
+25 6
)1 6
=10-7
=3;
(3)原式=-
×10 3
×3 7
=-1;7 10
(4)原式=
×(-4 5
)×(-25 3
)-(-2)×(-2)7 10
=
×4 5
×25 3
-2×27 10
=
-414 3
=
-14 3 12 3
=
.2 3