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©2025 数学クラブ http://sugaku.club/
月 日( )
● 計算しなさい
[1Q1-20]
(1)
8
5
18
5
+
(2)
75
7
27
7
+
(3)
1
8
5
18
5
−
+
5
(4)
9
18
7
50
7
−
+
10
(5)
45
7
125
7
+
(6)
8
3
50
3
−
(7)
1
75
7
2
27
7
−
−
7
3
(8)
125
7
20
7
+
(9)
3
50
7
8
7
−
+
4
(10)
27
5
2
12
5
−
+
9
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
8
5
18
5
+
2
5
2
5
=
2
+
3
2
5
=
5
10
=
(2)
75
7
27
7
+
3
7
3
7
=
5
+
3
3
7
=
8
8
21
=
7
(3)
1
8
5
18
5
−
+
5
1
2
5
2
5
=
−
×
2
+
3
5
13
2
5
=
5
13
10
=
25
(4)
9
18
7
50
7
−
+
10
9
2
7
2
7
=
−
×
3
+
5
10
23
2
7
=
10
23
14
=
70
(5)
45
7
125
7
+
5
7
5
7
=
3
+
5
5
7
=
8
8
35
=
7
(6)
8
3
50
3
−
2
3
2
3
=
2
−
5
2
3
=
−3
6
=
−
(7)
1
75
7
2
27
7
−
−
7
3
1
3
7
2
3
7
=
−
×
5
−
×
3
7
3
19
3
7
=
−
7
19
21
=
−
49
(8)
125
7
20
7
+
5
7
5
7
=
5
+
2
5
7
=
7
35
=
(9)
3
50
7
8
7
−
+
4
3
2
7
2
7
=
−
×
5
+
2
4
7
2
7
=
−
4
1
14
=
−
4
(10)
27
5
2
12
5
−
+
9
3
5
2
3
5
=
−
3
+
×
2
9
23
3
5
=
−
9
23
15
=
−
45