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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
50
2
(
−
7
)
(2)
28
2
7
(
＋
)
(3)
18
18
(
−
6
)
(4)
2
50
(
＋
3
)
(5)
5
3
5
(
＋
)
(6)
12
27
(
7
＋
)
(7)
7
7
(
5
＋
)
(8)
175
7
7
(
＋
)
(9)
18
2
(
−
6
)
(10)
3
3
(
＋
2
)
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
50
2
(
−
7
)
2
2
=
5
(
−
7
)
2
=
5
×
2
−
35
2
=
10
−
35
(2)
28
2
7
(
＋
)
7
2
7
=
2
(
＋
)
14
=
2
＋
2
×
7
14
=
2
＋
14
(3)
18
18
(
−
6
)
2
2
=
3
(
3
−
6
)
2
=
9
×
2
−
18
2
=
18
−
18
(4)
2
50
(
＋
3
)
2
2
=
(
5
＋
3
)
2
=
5
×
2
＋
3
2
=
10
＋
3
(5)
5
3
5
(
＋
)
15
=
＋
5
15
=
＋
5
(6)
12
27
(
7
＋
)
3
3
=
2
(
7
＋
3
)
3
=
14
＋
6
×
3
3
=
14
＋
18
(7)
7
7
(
5
＋
)
7
=
5
＋
7
7
=
5
＋
7
(8)
175
7
7
(
＋
)
7
7
7
=
5
(
＋
)
=
5
×
7
＋
5
×
7
=
70
(9)
18
2
(
−
6
)
2
2
=
3
(
−
6
)
2
=
3
×
2
−
18
2
=
6
−
18
(10)
3
3
(
＋
2
)
3
=
3
＋
2
3
=
3
＋
2