问题 解答题
脱式计算.步步为“赢”,胜利一定属于你!
35×140-2987
2
7
+
1
5
)×35
5
7
÷(
2
3
-
1
5
0.34×5+0.96÷32
5
6
-
1
8
)÷
5
12
9
20
÷[
1
2
×(
2
5
+
4
5
)].
答案

(1)35×140-2987,

=4900-2987,

=1913;

(2)(

2
7
+
1
5
)×35,

=

2
7
×35+
1
5
×35,

=10+7,

=17;

(3)

5
7
÷(
2
3
-
1
5
),

=

5
7
÷
7
15

=

75
49

(4)0.34×5+0.96÷32,

=1.7+0.03,

=1.73;

(5)(

5
6
-
1
8
)÷
5
12

=

17
24
÷
5
12

=

17
10

(6)

9
20
÷[
1
2
×(
2
5
+
4
5
)],

=

9
20
÷[
1
2
×
6
5
],

=

9
20
÷
3
5

=

3
4

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