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©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
45
7
125
(
＋
)
(2)
7
3
7
(
＋
)
(3)
5
5
(
−
5
)
(4)
20
2
125
(
＋
)
(5)
175
175
(
10
＋
)
(6)
8
2
(
−5
＋
)
(7)
27
3
(
−5
＋
)
(8)
125
125
5
(
＋
)
(9)
2
2
3
(
＋
)
(10)
2
2
5
(
＋
)
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
45
7
125
(
＋
)
5
7
5
=
3
(
＋
5
)
35
=
3
＋
15
×
5
35
=
3
＋
75
(2)
7
3
7
(
＋
)
21
=
＋
7
21
=
＋
7
(3)
5
5
(
−
5
)
5
=
5
−
5
5
=
5
−
5
(4)
20
2
125
(
＋
)
5
2
5
=
2
(
＋
5
)
10
=
2
＋
10
×
5
10
=
2
＋
50
(5)
175
175
(
10
＋
)
7
7
=
5
(
10
＋
5
)
7
=
50
＋
25
×
7
7
=
50
＋
175
(6)
8
2
(
−5
＋
)
2
2
=
2
(
−5
＋
)
2
=
−10
＋
2
×
2
2
=
−10
＋
4
(7)
27
3
(
−5
＋
)
3
3
=
3
(
−5
＋
)
3
=
−15
＋
3
×
3
3
=
−15
＋
9
(8)
125
125
5
(
＋
)
5
5
5
=
5
(
5
＋
)
=
25
×
5
＋
5
×
5
=
150
(9)
2
2
3
(
＋
)
6
=
2
＋
6
=
2
＋
(10)
2
2
5
(
＋
)
10
=
2
＋
10
=
2
＋