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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
45
5
5
(
＋
)
(2)
3
3
(
−
1
)
(3)
2
7
2
(
＋
)
(4)
12
3
27
(
＋
)
(5)
75
3
(
−
5
)
(6)
27
75
3
(
＋
)
(7)
5
125
(
6
＋
)
(8)
45
20
(
7
＋
)
(9)
5
45
2
(
＋
)
(10)
5
5
(
＋
4
)
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
45
5
5
(
＋
)
5
5
5
=
3
(
＋
)
=
3
×
5
＋
3
×
5
=
30
(2)
3
3
(
−
1
)
3
=
3
−
3
=
3
−
(3)
2
7
2
(
＋
)
14
=
＋
2
14
=
＋
2
(4)
12
3
27
(
＋
)
3
3
3
=
2
(
＋
3
)
=
2
×
3
＋
6
×
3
=
24
(5)
75
3
(
−
5
)
3
3
=
5
(
−
5
)
3
=
5
×
3
−
25
3
=
15
−
25
(6)
27
75
3
(
＋
)
3
3
3
=
3
(
5
＋
)
=
15
×
3
＋
3
×
3
=
54
(7)
5
125
(
6
＋
)
5
5
=
(
6
＋
5
)
5
=
6
＋
5
×
5
5
=
6
＋
25
(8)
45
20
(
7
＋
)
5
5
=
3
(
7
＋
2
)
5
=
21
＋
6
×
5
5
=
21
＋
30
(9)
5
45
2
(
＋
)
5
5
2
=
(
3
＋
)
10
=
3
×
5
＋
10
=
15
＋
(10)
5
5
(
＋
4
)
5
=
5
＋
4
5
=
5
＋
4