问题
解答题
计算 (1)1+(-2)+|-2-3|-5-(-9) (2)
(3)(
(4)0.25×(-2)3-[4÷(-
|
答案
(1)1+(-2)+|-2-3|-5-(-9)
=1-2+5-5+9
=-1+0+9
=8;
(2)
×(11 3
-1 3
)×1 2
÷3 11 5 4
=
×(-11 3
)×1 6
×3 11 4 5
=
×11 3
×(-11 3
)×1 6 4 5
=1×(-
)2 15
=-
;2 15
(3)(
+5 12
-2 3
)×(-12)3 4
=-
×12-5 12
×12+2 3
×123 4
=-5-8+9
=-4;
(4)0.25×(-2)3-[4÷(-
)2+1]+(-1)52 3
=-0.25×8-[4×
+1]-19 4
=-2-[9+1]-1
=-2-10-1
=-13.