问题
解答题
计算 (1)(-3)+(-4)-(+11)-(-9) (2)(-81)÷2
(3)8-23÷(-4)3-
(4)-32×2-3×(-2)2 (5)(
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答案
(1)(-3)+(-4)-(+11)-(-9)
=-3-4-11+9
=-18+9
=-9;
(2)(-81)÷2
×(-1 4
)÷(-16)4 9
=-81×
×4 9
×4 9 1 16
=-1;
(3)8-23÷(-4)3-1 8
=8+8÷64-1 8
═8+
-1 8 1 8
=8;
(4)-32×2-3×(-2)2
=-9×2-3×4
=-18-12
=-30;
(5)(
-1 2
+5 9
-5 6
)×(-36)7 12
=-18+20-30+21
=-48+41
=-7.