问题 解答题
计算下面各题,能简算的要简算
13.25-5.34-7.66+4.75
6.48÷[(3.3-2.7)×0.9]
10
13
×(
3
4
+1÷
5
6

7
8
×
13
9
+
13
9
÷8.
答案

(1)13.25-5.34-7.66+4.75

=(13.25+4.75)-(5.34+7.66)

=18-13

=5

(2)6.48÷[(3.3-2.7)×0.9]

=6.48÷[0.6×0.9]

=6.48÷0.54

=12

(3)

10
13
×(
3
4
+1÷
5
6

=

10
13
×(
3
4
+
6
5

=

10
13
×
39
20

=

3
2

(4)

7
8
×
13
9
+
13
9
÷8

=

7
8
×
13
9
+
13
9
×
1
8

=(

7
8
+
1
8
)×
13
9

=1×

13
9

=

13
9

判断题
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