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©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-20]
(1)
5
7
6
20
7
(
−
＋
)
7
(2)
3
5
27
5
4
(
＋
)
5
(3)
5
7
3
7
20
7
(
＋
)
(4)
12
5
27
5
2
7
(
＋
)
(5)
8
5
2
3
18
5
(
＋
)
(6)
8
3
2
3
2
(
−
)
7
(7)
50
3
2
2
3
(
＋
)
5
(8)
12
5
3
5
(
−
1
)
(9)
45
7
125
7
2
(
＋
)
3
(10)
12
7
3
7
(
＋
1
)
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
5
7
6
20
7
(
−
＋
)
7
5
7
6
5
7
=
(
−
＋
2
)
7
6
5
7
5
=
−
＋
2
×
7
7
6
35
10
=
−
＋
49
7
(2)
3
5
27
5
4
(
＋
)
5
3
5
3
5
4
=
(
3
＋
)
5
3
4
3
5
=
3
×
＋
5
5
9
4
15
=
＋
5
25
(3)
5
7
3
7
20
7
(
＋
)
5
7
3
7
5
7
=
(
＋
2
)
1
15
5
=
＋
2
×
7
7
1
15
10
=
＋
7
7
(4)
12
5
27
5
2
7
(
＋
)
3
5
3
5
2
7
=
2
(
3
＋
)
3
6
35
=
6
×
＋
2
5
18
2
210
=
＋
5
35
(5)
8
5
2
3
18
5
(
＋
)
2
5
2
3
2
5
=
2
(
＋
3
)
1
15
2
=
2
×
2
＋
6
×
5
4
15
12
=
＋
15
5
(6)
8
3
2
3
2
(
−
)
7
2
3
2
3
2
=
2
(
−
)
7
2
4
2
3
=
2
×
−
3
7
4
4
6
=
−
3
21
(7)
50
3
2
2
3
(
＋
)
5
2
3
2
2
3
=
5
(
＋
)
5
2
3
2
=
2
＋
5
×
3
2
6
10
=
＋
3
3
(8)
12
5
3
5
(
−
1
)
3
5
3
5
=
2
(
−
1
)
3
3
5
=
2
×
−
2
5
6
2
15
=
−
5
5
(9)
45
7
125
7
2
(
＋
)
3
5
7
5
7
2
=
3
(
5
＋
)
3
5
5
7
=
15
×
＋
2
7
75
2
35
=
＋
7
7
(10)
12
7
3
7
(
＋
1
)
3
7
3
7
=
2
(
＋
1
)
3
3
7
=
2
×
＋
2
7
6
2
21
=
＋
7
7