问题
解答题
计算: (1)(+
(2)-3.5÷
(3)-5×(-
(4)-24×(-
(5)(-1)2008+(-5)×[(-2)3+2]-(-4)2÷(-
(6)-19
|
答案
(1)原式=
-23 4
+3 4
-121 8
-45 7
=-2+1 8
-41 8
-121 8
=-2-4-125 7
=-185 7
;5 7
(2)原式=-
×7 2
×8 7
=-8 7
;32 7
(3)原式=1-13×
-3×11 5
=1-11 5
-143 5
=1-33 5
=-176 5
;171 5
(4)原式=24×
-24×1 2
+24×3 4
=12-18+8=2;1 3
(5)原式=1-5(-8+2)+16×2=1-5×(-6)+32=1+30+32=63;
(5)原式=(
-20)×3=1 9
×3-60=1 9
-60=-591 3
.2 3