问题
解答题
计算 (1)26-17+(-5)-33 (2)-23÷
(3)18-6÷(-2)×(-
(4)(-3)2×[
|
答案
(1)26-17+(-5)-33
=26+(-17)+(-5)+(-33)
=26+[(-17)+(-5)+(-33)]
=26+(-55)
=-29;
(2)-23÷
×(-4 9
)23 2
=-8÷
×4 9 9 4
=-8×
×9 4 9 4
=-
;81 2
(3)18-6÷(-2)×(-
)1 3
=18-6×(-
)×(-1 2
)1 3
=18-6×1 6
=18-1
=17;
(4)(-3)2×[
+(-2 3
)]5 9
=9×[
+(-2 3
)]5 9
=9×
+9×(-2 3
)5 9
=6+(-5)
=1.