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©2026 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)
27
7
3
7
2
3
(
＋
)
(3)
2
3
2
5
98
3
(
＋
)
(4)
2
5
1
18
5
(
−
＋
)
3
(5)
75
7
3
7
2
5
(
＋
)
(6)
20
7
1
5
7
(
−
＋
)
5
(7)
125
7
1
5
7
(
−
＋
)
2
(8)
3
7
27
7
2
5
(
＋
)
(9)
3
5
27
5
7
(
−
)
8
(10)
18
5
8
5
5
7
(
＋
)
©2026 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)
27
7
3
7
2
3
(
＋
)
3
7
3
7
2
3
=
3
(
＋
)
3
2
7
=
3
×
＋
3
7
9
3
14
=
＋
7
7
(3)
2
3
2
5
98
3
(
＋
)
2
3
2
5
2
3
=
(
＋
7
)
1
15
2
=
2
＋
7
×
3
2
15
14
=
＋
15
3
(4)
2
5
1
18
5
(
−
＋
)
3
2
5
1
2
5
=
(
−
＋
3
)
3
1
2
5
2
=
−
＋
3
×
3
5
1
10
6
=
−
＋
15
5
(5)
75
7
3
7
2
5
(
＋
)
3
7
3
7
2
5
=
5
(
＋
)
3
6
35
=
5
×
＋
5
7
15
1
210
=
＋
7
7
(6)
20
7
1
5
7
(
−
＋
)
5
5
7
1
5
7
=
2
(
−
＋
)
5
2
5
7
5
=
−
＋
2
×
5
7
2
35
10
=
−
＋
35
7
(7)
125
7
1
5
7
(
−
＋
)
2
5
7
1
5
7
=
5
(
−
＋
)
2
5
5
7
5
=
−
＋
5
×
2
7
5
35
25
=
−
＋
14
7
(8)
3
7
27
7
2
5
(
＋
)
3
7
3
7
2
5
=
(
3
＋
)
3
6
35
=
3
×
＋
7
9
210
=
＋
7
35
(9)
3
5
27
5
7
(
−
)
8
3
5
3
5
7
=
(
3
−
)
8
3
7
3
5
=
3
×
−
5
8
9
7
15
=
−
5
40
(10)
18
5
8
5
5
7
(
＋
)
2
5
2
5
5
7
=
3
(
2
＋
)
2
2
7
=
6
×
＋
3
5
12
3
14
=
＋
5
7