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©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-20]
(1)
8
7
1
18
7
(
＋
)
2
(2)
3
5
2
5
12
5
(
＋
)
(3)
8
5
1
98
5
(
−
＋
)
3
(4)
12
5
27
5
3
7
(
＋
)
(5)
2
3
2
5
50
3
(
＋
)
(6)
75
7
12
7
2
7
(
＋
)
(7)
2
7
18
7
7
(
−
)
10
(8)
8
3
5
7
50
3
(
＋
)
(9)
5
3
245
3
2
3
(
＋
)
(10)
12
5
3
5
27
5
(
＋
)
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
8
7
1
18
7
(
＋
)
2
2
7
1
2
7
=
2
(
＋
3
)
2
2
7
2
=
＋
6
×
7
1
14
12
=
＋
7
7
(2)
3
5
2
5
12
5
(
＋
)
3
5
2
5
3
5
=
(
＋
2
)
1
6
3
=
＋
2
×
5
5
1
6
6
=
＋
5
5
(3)
8
5
1
98
5
(
−
＋
)
3
2
5
1
2
5
=
2
(
−
＋
7
)
3
2
2
5
2
=
−
＋
14
×
3
5
2
10
28
=
−
＋
15
5
(4)
12
5
27
5
3
7
(
＋
)
3
5
3
5
3
7
=
2
(
3
＋
)
3
1
35
=
6
×
＋
2
×
3
5
18
6
35
=
＋
5
35
(5)
2
3
2
5
50
3
(
＋
)
2
3
2
5
2
3
=
(
＋
5
)
1
15
2
=
2
＋
5
×
3
2
15
10
=
＋
15
3
(6)
75
7
12
7
2
7
(
＋
)
3
7
3
7
2
7
=
5
(
2
＋
)
3
1
6
=
10
×
＋
5
×
7
7
30
5
6
=
＋
7
7
(7)
2
7
18
7
7
(
−
)
10
2
7
2
7
7
=
(
3
−
)
10
2
7
2
7
=
3
×
−
7
10
6
1
14
=
−
7
10
(8)
8
3
5
7
50
3
(
＋
)
2
3
5
7
2
3
=
2
(
＋
5
)
10
21
2
=
2
＋
10
×
3
2
210
20
=
＋
21
3
(9)
5
3
245
3
2
3
(
＋
)
5
3
5
3
2
3
=
(
7
＋
)
5
1
10
=
7
×
＋
3
3
35
1
10
=
＋
3
3
(10)
12
5
3
5
27
5
(
＋
)
3
5
3
5
3
5
=
2
(
＋
3
)
3
3
=
2
×
＋
6
×
5
5
24
=
5