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▲
©2018 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
98
3
(
＋
1
)
(3)
2
7
18
7
2
5
(
＋
)
(4)
2
7
18
7
3
7
(
＋
)
(5)
2
3
5
8
3
(
−
＋
)
9
(6)
2
7
50
7
5
7
(
＋
)
(7)
3
5
2
3
147
5
(
＋
)
(8)
8
7
18
7
3
7
(
＋
)
(9)
20
7
3
7
45
7
(
＋
)
(10)
8
5
18
5
2
5
(
＋
)
©2018 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
98
3
(
＋
1
)
2
3
2
3
=
(
7
＋
1
)
2
2
3
=
7
×
＋
3
14
1
6
=
＋
3
3
(3)
2
7
18
7
2
5
(
＋
)
2
7
2
7
2
5
=
(
3
＋
)
2
1
35
=
3
×
＋
2
7
6
2
35
=
＋
7
35
(4)
2
7
18
7
3
7
(
＋
)
2
7
2
7
3
7
=
(
3
＋
)
2
1
6
=
3
×
＋
7
7
6
1
6
=
＋
7
7
(5)
2
3
5
8
3
(
−
＋
)
9
2
3
5
2
3
=
(
−
＋
2
)
9
5
2
3
2
=
−
＋
2
×
9
3
5
6
4
=
−
＋
27
3
(6)
2
7
50
7
5
7
(
＋
)
2
7
2
7
5
7
=
(
5
＋
)
2
1
10
=
5
×
＋
7
7
10
1
10
=
＋
7
7
(7)
3
5
2
3
147
5
(
＋
)
3
5
2
3
3
5
=
(
＋
7
)
2
5
3
=
＋
7
×
5
10
21
=
＋
5
5
(8)
8
7
18
7
3
7
(
＋
)
2
7
2
7
3
7
=
2
(
3
＋
)
2
1
6
=
6
×
＋
2
×
7
7
12
2
6
=
＋
7
7
(9)
20
7
3
7
45
7
(
＋
)
5
7
3
7
5
7
=
2
(
＋
3
)
1
15
5
=
2
×
＋
6
×
7
7
2
15
30
=
＋
7
7
(10)
8
5
18
5
2
5
(
＋
)
2
5
2
5
2
5
=
2
(
3
＋
)
2
2
=
6
×
＋
2
×
5
5
16
=
5