［文字サイズの変更］
▼
▲
©2019 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-20]
(1)
3
5
2
5
12
5
(
＋
)
(2)
50
3
3
7
2
3
(
＋
)
(3)
18
7
50
7
3
7
(
＋
)
(4)
3
7
3
27
7
(
−
＋
)
10
(5)
2
7
8
7
(
1
＋
)
(6)
18
5
5
7
8
5
(
＋
)
(7)
2
5
18
5
(
−1
＋
)
(8)
18
7
50
7
5
7
(
＋
)
(9)
75
7
12
7
2
3
(
＋
)
(10)
8
3
2
3
(
−
1
)
©2019 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
5
2
5
12
5
(
＋
)
3
5
2
5
3
5
=
(
＋
2
)
1
6
3
=
＋
2
×
5
5
1
6
6
=
＋
5
5
(2)
50
3
3
7
2
3
(
＋
)
2
3
3
7
2
3
=
5
(
＋
)
2
7
2
=
5
＋
5
×
3
5
14
10
=
＋
7
3
(3)
18
7
50
7
3
7
(
＋
)
2
7
2
7
3
7
=
3
(
5
＋
)
2
1
6
=
15
×
＋
3
×
7
7
30
3
6
=
＋
7
7
(4)
3
7
3
27
7
(
−
＋
)
10
3
7
3
3
7
=
(
−
＋
3
)
10
3
3
7
3
=
−
＋
3
×
10
7
3
21
9
=
−
＋
70
7
(5)
2
7
8
7
(
1
＋
)
2
7
2
7
=
(
1
＋
2
)
2
7
2
=
＋
2
×
7
1
14
4
=
＋
7
7
(6)
18
5
5
7
8
5
(
＋
)
2
5
5
7
2
5
=
3
(
＋
2
)
2
7
2
=
3
＋
6
×
5
3
14
12
=
＋
7
5
(7)
2
5
18
5
(
−1
＋
)
2
5
2
5
=
(
−1
＋
3
)
2
5
2
=
−
＋
3
×
5
1
10
6
=
−
＋
5
5
(8)
18
7
50
7
5
7
(
＋
)
2
7
2
7
5
7
=
3
(
5
＋
)
2
1
10
=
15
×
＋
3
×
7
7
30
3
10
=
＋
7
7
(9)
75
7
12
7
2
3
(
＋
)
3
7
3
7
2
3
=
5
(
2
＋
)
3
2
7
=
10
×
＋
5
7
30
5
14
=
＋
7
7
(10)
8
3
2
3
(
−
1
)
2
3
2
3
=
2
(
−
1
)
2
2
3
=
2
×
−
2
3
4
2
6
=
−
3
3