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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
20
7
2
5
(
＋
)
(2)
2
3
4
98
3
(
＋
)
9
(3)
12
5
2
147
5
(
−
＋
)
7
(4)
50
7
3
8
7
(
＋
)
8
(5)
27
7
12
7
(
−1
＋
)
(6)
2
3
8
3
1
(
−
)
4
(7)
2
5
18
5
3
(
＋
)
7
(8)
3
5
147
5
(
−1
＋
)
(9)
3
7
75
7
5
(
−
)
6
(10)
8
7
2
7
2
(
−
)
3
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
5
7
20
7
2
5
(
＋
)
5
7
5
7
2
5
=
(
2
＋
)
5
2
7
=
2
×
＋
7
10
14
=
＋
7
7
(2)
2
3
4
98
3
(
＋
)
9
2
3
4
2
3
=
(
＋
7
)
9
4
2
3
2
=
＋
7
×
9
3
4
6
14
=
＋
27
3
(3)
12
5
2
147
5
(
−
＋
)
7
3
5
2
3
5
=
2
(
−
＋
7
)
7
4
3
5
3
=
−
＋
14
×
7
5
4
15
42
=
−
＋
35
5
(4)
50
7
3
8
7
(
＋
)
8
2
7
3
2
7
=
5
(
＋
2
)
8
15
2
7
2
=
＋
10
×
8
7
15
14
20
=
＋
56
7
(5)
27
7
12
7
(
−1
＋
)
3
7
3
7
=
3
(
−1
＋
2
)
3
7
3
=
−3
＋
6
×
7
3
21
18
=
−
＋
7
7
(6)
2
3
8
3
1
(
−
)
4
2
3
2
3
1
=
(
2
−
)
4
2
1
2
3
=
2
×
−
3
4
4
1
6
=
−
3
12
(7)
2
5
18
5
3
(
＋
)
7
2
5
2
5
3
=
(
3
＋
)
7
2
3
2
5
=
3
×
＋
5
7
6
3
10
=
＋
5
35
(8)
3
5
147
5
(
−1
＋
)
3
5
3
5
=
(
−1
＋
7
)
3
5
3
=
−
＋
7
×
5
1
15
21
=
−
＋
5
5
(9)
3
7
75
7
5
(
−
)
6
3
7
3
7
5
=
(
5
−
)
6
3
5
3
7
=
5
×
−
7
6
15
5
21
=
−
7
42
(10)
8
7
2
7
2
(
−
)
3
2
7
2
7
2
=
2
(
−
)
3
2
4
2
7
=
2
×
−
7
3
4
4
14
=
−
7
21