问题 解答题
灵活计算.
952-952÷17
3
4
-
3
4
×
2
5
÷
1
5
5
12
+
1
19
)×12+
7
19
1.28×5.37-2.8×0.537
2
7
×
11
15
+
4
15
÷
7
2
1
21
×
1
17
×(2009×42×85)
答案

(1)952-952÷17,

=952-56,

=896;

(2)(

3
4
-
3
4
×
2
5
÷
1
5

=(

3
4
-
3
10
÷
1
5

=

9
20
÷
1
5

=

9
4

(3)(

5
12
+
1
19
)×12+
7
19

=

5
12
×12+
1
19
×12+
7
19

=5+

12
19
+
7
12

=5+(

12
19
+
7
12
),

=5+1,

=6;

(4)1.28×5.37-2.8×0.537,

=1.28×5.37-0.28×5.37,

=(1.28-0.28)×5.37,

=1×5.37,

=5.37;

(5)

2
7
×
11
15
+
4
15
÷
7
2

=

2
7
×
11
15
+
4
15
×
2
7

=

2
7
×(
11
15
+
4
15
),

=

2
7
×1,

=

2
7

(6)

1
21
×
1
17
×(2009×42×85),

=

1
21
×
1
17
×2009×42×85,

=2009×2×5,

=2009×(2×5),

=2009×10,

=20090.

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