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©2026 数学クラブ http://sugaku.club/
月 日( )
● 計算しなさい
[1Q1-20]
(1)
3
45
7
3
125
7
−
+
5
4
(2)
50
3
98
3
+
(3)
5
27
7
12
7
−
+
6
(4)
8
5
1
18
5
+
3
(5)
18
5
8
5
+
(6)
125
7
45
7
+
(7)
1
125
7
45
7
+
2
(8)
12
7
27
7
+
(9)
2
18
5
8
5
−
3
(10)
4
27
5
12
5
−
+
7
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
3
45
7
3
125
7
−
+
5
4
3
5
7
3
5
7
=
−
×
3
+
×
5
5
4
39
5
7
=
20
39
35
=
140
(2)
50
3
98
3
+
2
3
2
3
=
5
+
7
2
3
=
12
6
=
4
(3)
5
27
7
12
7
−
+
6
5
3
7
3
7
=
−
×
3
+
2
6
1
3
7
=
−
2
1
21
=
−
14
(4)
8
5
1
18
5
+
3
2
5
1
2
5
=
2
+
×
3
3
2
5
=
3
3
10
=
5
(5)
18
5
8
5
+
2
5
2
5
=
3
+
2
2
5
=
5
10
=
(6)
125
7
45
7
+
5
7
5
7
=
5
+
3
5
7
=
8
8
35
=
7
(7)
1
125
7
45
7
+
2
1
5
7
5
7
=
×
5
+
3
2
11
5
7
=
2
11
35
=
14
(8)
12
7
27
7
+
3
7
3
7
=
2
+
3
3
7
=
5
5
21
=
7
(9)
2
18
5
8
5
−
3
2
2
5
2
5
=
×
3
−
2
3
=
0
(10)
4
27
5
12
5
−
+
7
4
3
5
3
5
=
−
×
3
+
2
7
2
3
5
=
7
2
15
=
35