问题 解答题
计算:
(1)-6-8-2+3.54-4.72+16.46-5.28;
(2)(-3
2
3
)-(-2
3
4
)-(-1
2
3
)-1.75.
答案

(1)-6-8-2+3.54-4.72+16.46-5.28

=(-6-8-2-4.72-5.28)+(3.54+16.46)

=-26+20

=-6;

(2)(-3

2
3
)-(-2
3
4
)-(-1
2
3
)-1.75

=(-3

2
3
)+2
3
4
+1
2
3
-1
3
4

=(-3

2
3
+1
2
3
)+(2
3
4
-1
3
4

=-2+1

=-1.

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