问题
解答题
(1)-4.27+3.8-0.73+1.2 (2)(-
(3)-
(4)
|
答案
(1)原式=(-4.27-0.73)+(3.8+1.2)
=-5+5
=0;
(2)原式=(-
)×(-48)+1 6
×(-48)-3 4
×(-48)1 12
=8-36+4
=24;
(3)原式=-
×[-9×3 4
-2]4 9
=-
×[-4-2]3 4
=-
×(-6)3 4
=
;9 2
(4)原式=
×(-2 3
+3 2
)3 2
=0.