试题与答案

100-98.2-1.8.834+4.7+114+5.314.71-578-41

题型:解答题

题目:

100-98.2-1.8.
8
3
4
+4.7+1
1
4
+5.3
14.71-5
7
8
-4
1
8

答案:

①100-98.2-1.8

=100-(98.2+1.8)

=100-100

=0;

②8

3
4
+4.7+1
1
4
+5.3

=(8

3
4
+1
1
4
)+(4.7+5.3)

=10+10

=20;

③14.71-5

7
8
-4
1
8

=14.71-(5

7
8
+4
1
8

=14.71-10

=4.71.

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