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▲
©2018 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-20]
(1)
75
7
3
5
27
7
(
＋
)
(2)
12
5
147
5
5
7
(
＋
)
(3)
8
5
2
7
18
5
(
＋
)
(4)
3
7
1
12
7
(
＋
)
3
(5)
12
7
27
7
1
(
−
)
5
(6)
2
7
50
7
3
(
−
)
5
(7)
27
5
2
7
3
5
(
＋
)
(8)
18
7
2
3
2
7
(
＋
)
(9)
5
7
5
2
45
7
(
＋
)
(10)
2
5
2
3
98
5
(
＋
)
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
75
7
3
5
27
7
(
＋
)
3
7
3
5
3
7
=
5
(
＋
3
)
1
35
3
=
5
×
3
＋
15
×
7
3
35
45
=
＋
7
7
(2)
12
5
147
5
5
7
(
＋
)
3
5
3
5
5
7
=
2
(
7
＋
)
3
3
7
=
14
×
＋
2
5
42
2
21
=
＋
5
7
(3)
8
5
2
7
18
5
(
＋
)
2
5
2
7
2
5
=
2
(
＋
3
)
1
35
2
=
2
×
2
＋
6
×
5
4
35
12
=
＋
35
5
(4)
3
7
1
12
7
(
＋
)
3
3
7
1
3
7
=
(
＋
2
)
3
1
3
7
3
=
＋
2
×
3
7
1
21
6
=
＋
21
7
(5)
12
7
27
7
1
(
−
)
5
3
7
3
7
1
=
2
(
3
−
)
5
3
2
3
7
=
6
×
−
7
5
18
2
21
=
−
7
35
(6)
2
7
50
7
3
(
−
)
5
2
7
2
7
3
=
(
5
−
)
5
2
3
2
7
=
5
×
−
7
5
10
3
14
=
−
7
35
(7)
27
5
2
7
3
5
(
＋
)
3
5
2
7
3
5
=
3
(
＋
)
6
35
3
=
3
＋
3
×
5
3
210
9
=
＋
35
5
(8)
18
7
2
3
2
7
(
＋
)
2
7
2
3
2
7
=
3
(
＋
)
1
21
2
=
3
×
2
＋
3
×
7
2
21
6
=
＋
7
7
(9)
5
7
5
2
45
7
(
＋
)
5
7
5
2
5
7
=
(
＋
3
)
1
14
5
=
5
＋
3
×
7
5
14
15
=
＋
14
7
(10)
2
5
2
3
98
5
(
＋
)
2
5
2
3
2
5
=
(
＋
7
)
1
15
2
=
2
＋
7
×
5
2
15
14
=
＋
15
5