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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
3
12
(
−
9
)
(2)
5
125
3
(
＋
)
(3)
5
5
3
(
＋
)
(4)
27
3
3
(
＋
)
(5)
20
5
(
4
＋
)
(6)
3
7
3
(
＋
)
(7)
20
5
7
(
＋
)
(8)
18
5
2
(
＋
)
(9)
7
5
7
(
＋
)
(10)
7
28
(
3
＋
)
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
12
(
−
9
)
3
3
=
(
2
−
9
)
3
=
2
×
3
−
9
3
=
6
−
9
(2)
5
125
3
(
＋
)
5
5
3
=
(
5
＋
)
15
=
5
×
5
＋
15
=
25
＋
(3)
5
5
3
(
＋
)
15
=
5
＋
15
=
5
＋
(4)
27
3
3
(
＋
)
3
3
3
=
3
(
＋
)
=
3
×
3
＋
3
×
3
=
18
(5)
20
5
(
4
＋
)
5
5
=
2
(
4
＋
)
5
=
8
＋
2
×
5
5
=
8
＋
10
(6)
3
7
3
(
＋
)
21
=
＋
3
21
=
＋
3
(7)
20
5
7
(
＋
)
5
5
7
=
2
(
＋
)
35
=
2
×
5
＋
2
35
=
10
＋
2
(8)
18
5
2
(
＋
)
2
5
2
=
3
(
＋
)
10
=
3
＋
3
×
2
10
=
3
＋
6
(9)
7
5
7
(
＋
)
35
=
＋
7
35
=
＋
7
(10)
7
28
(
3
＋
)
7
7
=
(
3
＋
2
)
7
=
3
＋
2
×
7
7
=
3
＋
14