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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-20]
(1)
125
7
5
7
1
(
−
)
2
(2)
27
5
12
5
(
1
＋
)
(3)
75
7
12
7
2
(
＋
)
3
(4)
2
5
18
5
3
5
(
＋
)
(5)
18
5
2
7
8
5
(
＋
)
(6)
18
5
2
5
3
5
(
＋
)
(7)
27
5
3
5
1
(
−
)
9
(8)
3
5
3
7
12
5
(
＋
)
(9)
2
5
3
5
18
5
(
＋
)
(10)
3
7
12
7
1
(
＋
)
5
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
125
7
5
7
1
(
−
)
2
5
7
5
7
1
=
5
(
−
)
2
5
5
5
7
=
5
×
−
7
2
25
5
35
=
−
7
14
(2)
27
5
12
5
(
1
＋
)
3
5
3
5
=
3
(
1
＋
2
)
3
5
3
=
3
＋
6
×
5
3
15
18
=
＋
5
5
(3)
75
7
12
7
2
(
＋
)
3
3
7
3
7
2
=
5
(
2
＋
)
3
3
10
3
7
=
10
×
＋
7
3
30
10
21
=
＋
7
21
(4)
2
5
18
5
3
5
(
＋
)
2
5
2
5
3
5
=
(
3
＋
)
2
1
6
=
3
×
＋
5
5
6
1
6
=
＋
5
5
(5)
18
5
2
7
8
5
(
＋
)
2
5
2
7
2
5
=
3
(
＋
2
)
1
35
2
=
3
×
2
＋
6
×
5
6
35
12
=
＋
35
5
(6)
18
5
2
5
3
5
(
＋
)
2
5
2
5
3
5
=
3
(
＋
)
2
1
6
=
3
×
＋
3
×
5
5
6
3
6
=
＋
5
5
(7)
27
5
3
5
1
(
−
)
9
3
5
3
5
1
=
3
(
−
)
9
3
1
3
5
=
3
×
−
5
3
9
1
15
=
−
5
15
(8)
3
5
3
7
12
5
(
＋
)
3
5
3
7
3
5
=
(
＋
2
)
1
35
3
=
3
＋
2
×
5
3
35
6
=
＋
35
5
(9)
2
5
3
5
18
5
(
＋
)
2
5
3
5
2
5
=
(
＋
3
)
1
6
2
=
＋
3
×
5
5
1
6
6
=
＋
5
5
(10)
3
7
12
7
1
(
＋
)
5
3
7
3
7
1
=
(
2
＋
)
5
3
1
3
7
=
2
×
＋
7
5
6
1
21
=
＋
7
35