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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
125
3
(
＋
)
(2)
2
3
8
(
＋
)
(3)
12
3
(
9
＋
)
(4)
12
3
5
(
＋
)
(5)
7
7
(
−1
＋
)
(6)
18
8
3
(
＋
)
(7)
8
5
2
(
＋
)
(8)
50
2
(
−10
＋
)
(9)
28
7
(
−1
＋
)
(10)
75
3
3
(
＋
)
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
45
125
3
(
＋
)
5
5
3
=
3
(
5
＋
)
15
=
15
×
5
＋
3
15
=
75
＋
3
(2)
2
3
8
(
＋
)
2
3
2
=
(
＋
2
)
6
=
＋
2
×
2
6
=
＋
4
(3)
12
3
(
9
＋
)
3
3
=
2
(
9
＋
)
3
=
18
＋
2
×
3
3
=
18
＋
6
(4)
12
3
5
(
＋
)
3
3
5
=
2
(
＋
)
15
=
2
×
3
＋
2
15
=
6
＋
2
(5)
7
7
(
−1
＋
)
7
=
−
＋
7
7
=
−
＋
7
(6)
18
8
3
(
＋
)
2
2
3
=
3
(
2
＋
)
6
=
6
×
2
＋
3
6
=
12
＋
3
(7)
8
5
2
(
＋
)
2
5
2
=
2
(
＋
)
10
=
2
＋
2
×
2
10
=
2
＋
4
(8)
50
2
(
−10
＋
)
2
2
=
5
(
−10
＋
)
2
=
−50
＋
5
×
2
2
=
−50
＋
10
(9)
28
7
(
−1
＋
)
7
7
=
2
(
−1
＋
)
7
=
−2
＋
2
×
7
7
=
−2
＋
14
(10)
75
3
3
(
＋
)
3
3
3
=
5
(
＋
)
=
5
×
3
＋
5
×
3
=
30