[文字サイズの変更]
▼
▲
©2026 数学クラブ http://sugaku.club/
月 日( )
● 計算しなさい
[1Q1-20]
(1)
28
3
175
3
+
(2)
27
5
12
5
+
(3)
27
7
1
75
7
+
2
(4)
1
12
7
2
75
7
+
2
3
(5)
50
3
1
98
3
+
5
(6)
2
75
7
27
7
+
3
(7)
8
5
98
5
+
(8)
27
7
1
12
7
−
2
(9)
50
7
8
7
−
+
(10)
75
7
27
7
+
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
28
3
175
3
+
7
3
7
3
=
2
+
5
7
3
=
7
7
21
=
3
(2)
27
5
12
5
+
3
5
3
5
=
3
+
2
3
5
=
5
15
=
(3)
27
7
1
75
7
+
2
3
7
1
3
7
=
3
+
×
5
2
11
3
7
=
2
11
21
=
14
(4)
1
12
7
2
75
7
+
2
3
1
3
7
2
3
7
=
×
2
+
×
5
2
3
13
3
7
=
3
13
21
=
21
(5)
50
3
1
98
3
+
5
2
3
1
2
3
=
5
+
×
7
5
32
2
3
=
5
32
6
=
15
(6)
2
75
7
27
7
+
3
2
3
7
3
7
=
×
5
+
3
3
19
3
7
=
3
19
21
=
21
(7)
8
5
98
5
+
2
5
2
5
=
2
+
7
2
5
=
9
9
10
=
5
(8)
27
7
1
12
7
−
2
3
7
1
3
7
=
3
−
×
2
2
3
7
=
2
2
21
=
7
(9)
50
7
8
7
−
+
2
7
2
7
=
−
5
+
2
2
7
=
−3
3
14
=
−
7
(10)
75
7
27
7
+
3
7
3
7
=
5
+
3
3
7
=
8
8
21
=
7