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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
7
7
2
(
＋
)
(2)
50
2
5
(
＋
)
(3)
28
2
7
(
＋
)
(4)
27
3
(
−
1
)
(5)
2
18
3
(
＋
)
(6)
7
63
5
(
＋
)
(7)
5
20
(
−5
＋
)
(8)
20
45
(
−7
＋
)
(9)
45
45
2
(
＋
)
(10)
20
5
3
(
＋
)
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
7
7
2
(
＋
)
14
=
7
＋
14
=
7
＋
(2)
50
2
5
(
＋
)
2
2
5
=
5
(
＋
)
10
=
5
×
2
＋
5
10
=
10
＋
5
(3)
28
2
7
(
＋
)
7
2
7
=
2
(
＋
)
14
=
2
＋
2
×
7
14
=
2
＋
14
(4)
27
3
(
−
1
)
3
3
=
3
(
−
1
)
3
=
3
×
3
−
3
3
=
9
−
3
(5)
2
18
3
(
＋
)
2
2
3
=
(
3
＋
)
6
=
3
×
2
＋
6
=
6
＋
(6)
7
63
5
(
＋
)
7
7
5
=
(
3
＋
)
35
=
3
×
7
＋
35
=
21
＋
(7)
5
20
(
−5
＋
)
5
5
=
(
−5
＋
2
)
5
=
−5
＋
2
×
5
5
=
−5
＋
10
(8)
20
45
(
−7
＋
)
5
5
=
2
(
−7
＋
3
)
5
=
−14
＋
6
×
5
5
=
−14
＋
30
(9)
45
45
2
(
＋
)
5
5
2
=
3
(
3
＋
)
10
=
9
×
5
＋
3
10
=
45
＋
3
(10)
20
5
3
(
＋
)
5
5
3
=
2
(
＋
)
15
=
2
×
5
＋
2
15
=
10
＋
2