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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-20]
(1)
5
7
20
7
(
−1
＋
)
(2)
3
5
147
5
(
−
1
)
(3)
2
3
8
3
3
5
(
＋
)
(4)
27
5
147
5
3
5
(
＋
)
(5)
8
3
2
3
(
−1
＋
)
(6)
50
3
2
3
2
3
(
＋
)
(7)
12
7
75
7
2
7
(
＋
)
(8)
3
7
12
7
4
(
−
)
5
(9)
3
7
3
7
12
7
(
＋
)
(10)
8
3
2
5
2
3
(
＋
)
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
5
7
20
7
(
−1
＋
)
5
7
5
7
=
(
−1
＋
2
)
5
7
5
=
−
＋
2
×
7
1
35
10
=
−
＋
7
7
(2)
3
5
147
5
(
−
1
)
3
5
3
5
=
(
7
−
1
)
3
3
5
=
7
×
−
5
21
1
15
=
−
5
5
(3)
2
3
8
3
3
5
(
＋
)
2
3
2
3
3
5
=
(
2
＋
)
2
2
5
=
2
×
＋
3
4
10
=
＋
3
5
(4)
27
5
147
5
3
5
(
＋
)
3
5
3
5
3
5
=
3
(
7
＋
)
3
3
=
21
×
＋
3
×
5
5
72
=
5
(5)
8
3
2
3
(
−1
＋
)
2
3
2
3
=
2
(
−1
＋
)
2
3
2
=
−2
＋
2
×
3
2
6
4
=
−
＋
3
3
(6)
50
3
2
3
2
3
(
＋
)
2
3
2
3
2
3
=
5
(
＋
)
2
2
=
5
×
＋
5
×
3
3
20
=
3
(7)
12
7
75
7
2
7
(
＋
)
3
7
3
7
2
7
=
2
(
5
＋
)
3
1
6
=
10
×
＋
2
×
7
7
30
2
6
=
＋
7
7
(8)
3
7
12
7
4
(
−
)
5
3
7
3
7
4
=
(
2
−
)
5
3
4
3
7
=
2
×
−
7
5
6
4
21
=
−
7
35
(9)
3
7
3
7
12
7
(
＋
)
3
7
3
7
3
7
=
(
＋
2
)
3
3
=
＋
2
×
7
7
9
=
7
(10)
8
3
2
5
2
3
(
＋
)
2
3
2
5
2
3
=
2
(
＋
)
1
15
2
=
2
×
2
＋
2
×
3
4
15
4
=
＋
15
3