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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
12
3
(
−1
＋
)
(2)
5
2
125
(
＋
)
(3)
3
12
(
9
＋
)
(4)
5
20
2
(
＋
)
(5)
28
7
(
−
4
)
(6)
2
2
(
3
＋
)
(7)
5
7
5
(
＋
)
(8)
27
3
(
−
9
)
(9)
18
3
8
(
＋
)
(10)
75
75
(
−8
＋
)
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
12
3
(
−1
＋
)
3
3
=
2
(
−1
＋
)
3
=
−2
＋
2
×
3
3
=
−2
＋
6
(2)
5
2
125
(
＋
)
5
2
5
=
(
＋
5
)
10
=
＋
5
×
5
10
=
＋
25
(3)
3
12
(
9
＋
)
3
3
=
(
9
＋
2
)
3
=
9
＋
2
×
3
3
=
9
＋
6
(4)
5
20
2
(
＋
)
5
5
2
=
(
2
＋
)
10
=
2
×
5
＋
10
=
10
＋
(5)
28
7
(
−
4
)
7
7
=
2
(
−
4
)
7
=
2
×
7
−
8
7
=
14
−
8
(6)
2
2
(
3
＋
)
2
=
3
＋
2
2
=
3
＋
2
(7)
5
7
5
(
＋
)
35
=
＋
5
35
=
＋
5
(8)
27
3
(
−
9
)
3
3
=
3
(
−
9
)
3
=
3
×
3
−
27
3
=
9
−
27
(9)
18
3
8
(
＋
)
2
3
2
=
3
(
＋
2
)
6
=
3
＋
6
×
2
6
=
3
＋
12
(10)
75
75
(
−8
＋
)
3
3
=
5
(
−8
＋
5
)
3
=
−40
＋
25
×
3
3
=
−40
＋
75