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▲
©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-20]
(1)
2
5
8
5
(
＋
1
)
(2)
50
3
2
3
98
3
(
＋
)
(3)
27
5
2
3
12
5
(
＋
)
(4)
18
7
5
8
7
(
＋
)
6
(5)
50
3
8
3
3
(
−
)
4
(6)
8
5
2
5
3
(
＋
)
4
(7)
2
5
98
5
3
5
(
＋
)
(8)
75
7
3
7
(
1
＋
)
(9)
5
7
45
7
2
3
(
＋
)
(10)
125
7
20
7
2
7
(
＋
)
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
5
8
5
(
＋
1
)
2
5
2
5
=
(
2
＋
1
)
2
2
5
=
2
×
＋
5
4
1
10
=
＋
5
5
(2)
50
3
2
3
98
3
(
＋
)
2
3
2
3
2
3
=
5
(
＋
7
)
2
2
=
5
×
＋
35
×
3
3
80
=
3
(3)
27
5
2
3
12
5
(
＋
)
3
5
2
3
3
5
=
3
(
＋
2
)
2
5
3
=
3
＋
6
×
5
3
10
18
=
＋
5
5
(4)
18
7
5
8
7
(
＋
)
6
2
7
5
2
7
=
3
(
＋
2
)
6
5
2
7
2
=
＋
6
×
2
7
5
14
12
=
＋
14
7
(5)
50
3
8
3
3
(
−
)
4
2
3
2
3
3
=
5
(
2
−
)
4
2
15
2
3
=
10
×
−
3
4
20
5
6
=
−
3
4
(6)
8
5
2
5
3
(
＋
)
4
2
5
2
5
3
=
2
(
＋
)
4
2
3
2
5
=
2
×
＋
5
2
4
3
10
=
＋
5
10
(7)
2
5
98
5
3
5
(
＋
)
2
5
2
5
3
5
=
(
7
＋
)
2
1
6
=
7
×
＋
5
5
14
1
6
=
＋
5
5
(8)
75
7
3
7
(
1
＋
)
3
7
3
7
=
5
(
1
＋
)
3
7
3
=
5
＋
5
×
7
5
21
15
=
＋
7
7
(9)
5
7
45
7
2
3
(
＋
)
5
7
5
7
2
3
=
(
3
＋
)
5
10
21
=
3
×
＋
7
15
210
=
＋
7
21
(10)
125
7
20
7
2
7
(
＋
)
5
7
5
7
2
7
=
5
(
2
＋
)
5
1
10
=
10
×
＋
5
×
7
7
50
5
10
=
＋
7
7