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©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
2
18
(
−2
＋
)
(2)
50
2
(
−1
＋
)
(3)
50
2
(
4
＋
)
(4)
125
20
(
5
＋
)
(5)
18
2
(
＋
9
)
(6)
5
5
(
8
＋
)
(7)
5
2
20
(
＋
)
(8)
3
3
(
−2
＋
)
(9)
5
2
20
(
＋
)
(10)
2
8
(
−
3
)
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
18
(
−2
＋
)
2
2
=
(
−2
＋
3
)
2
=
−2
＋
3
×
2
2
=
−2
＋
6
(2)
50
2
(
−1
＋
)
2
2
=
5
(
−1
＋
)
2
=
−5
＋
5
×
2
2
=
−5
＋
10
(3)
50
2
(
4
＋
)
2
2
=
5
(
4
＋
)
2
=
20
＋
5
×
2
2
=
20
＋
10
(4)
125
20
(
5
＋
)
5
5
=
5
(
5
＋
2
)
5
=
25
＋
10
×
5
5
=
25
＋
50
(5)
18
2
(
＋
9
)
2
2
=
3
(
＋
9
)
2
=
3
×
2
＋
27
2
=
6
＋
27
(6)
5
5
(
8
＋
)
5
=
8
＋
5
5
=
8
＋
5
(7)
5
2
20
(
＋
)
5
2
5
=
(
＋
2
)
10
=
＋
2
×
5
10
=
＋
10
(8)
3
3
(
−2
＋
)
3
=
−2
＋
3
3
=
−2
＋
3
(9)
5
2
20
(
＋
)
5
2
5
=
(
＋
2
)
10
=
＋
2
×
5
10
=
＋
10
(10)
2
8
(
−
3
)
2
2
=
(
2
−
3
)
2
=
2
×
2
−
3
2
=
4
−
3