问题 解答题
脱式计算
6-
5
3
×
1
2
-
1
6

{1-(
1
12
-
1
18
)}÷
5
8

3.6×2
8
25
÷16.9÷(3
3
5
×1.16)×1.3

1
1×2
+
1
2×3
+
1
3×4
+…+
1
99×100
答案

(1)6-

5
3
×
1
2
-
1
6

=6-

5
6
-
1
6

=6-(

5
6
+
1
6
),

=6-1,

=5;

(2){1-(

1
12
-
1
18
)}÷
5
8

=(1-

1
36
÷
5
8

=

35
36
×
8
5

=1

5
9

(3)3.6×2

8
25
÷16.9÷(3
3
5
×1.16)×1.3,

=3.6×2

8
25
÷16.9÷4.176×1.3,

=3

3
5
×2
8
25
÷16
9
10
÷4
22
125
×1
3
10

=

2
13

(4)

1
1×2
+
1
2×3
+
1
3×4
+…+
1
99×100

=1-

1
2
+
1
2
-
1
3
+
1
3
-
1
4
+…+
1
99
-
1
100

=1-

1
100

=

99
100

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