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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)
50
3
98
3
−
(3)
8
3
98
3
+
(4)
27
5
5
12
5
−
9
(5)
2
75
7
27
7
+
5
(6)
1
50
7
8
7
+
2
(7)
1
18
7
1
50
7
+
3
2
(8)
75
7
1
27
7
+
2
(9)
8
3
1
98
3
−
10
(10)
12
5
27
5
+
©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
=
1
10
=
5
(2)
50
3
98
3
−
2
3
2
3
=
5
−
7
2
3
=
−2
2
6
=
−
3
(3)
8
3
98
3
+
2
3
2
3
=
2
+
7
2
3
=
9
6
=
3
(4)
27
5
5
12
5
−
9
3
5
5
3
5
=
3
−
×
2
9
17
3
5
=
9
17
15
=
45
(5)
2
75
7
27
7
+
5
2
3
7
3
7
=
×
5
+
3
5
3
7
=
5
5
21
=
7
(6)
1
50
7
8
7
+
2
1
2
7
2
7
=
×
5
+
2
2
9
2
7
=
2
9
14
=
14
(7)
1
18
7
1
50
7
+
3
2
1
2
7
1
2
7
=
×
3
+
×
5
3
2
7
2
7
=
2
1
14
=
2
(8)
75
7
1
27
7
+
2
3
7
1
3
7
=
5
+
×
3
2
13
3
7
=
2
13
21
=
14
(9)
8
3
1
98
3
−
10
2
3
1
2
3
=
2
−
×
7
10
13
2
3
=
10
13
6
=
30
(10)
12
5
27
5
+
3
5
3
5
=
2
+
3
3
5
=
5
15
=