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▲
©2018 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
20
5
(
7
＋
)
(2)
3
5
27
(
＋
)
(3)
3
3
(
＋
3
)
(4)
3
3
(
−
5
)
(5)
3
75
2
(
＋
)
(6)
75
7
12
(
＋
)
(7)
2
8
(
−
7
)
(8)
27
5
3
(
＋
)
(9)
5
45
3
(
＋
)
(10)
125
20
(
7
＋
)
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
20
5
(
7
＋
)
5
5
=
2
(
7
＋
)
5
=
14
＋
2
×
5
5
=
14
＋
10
(2)
3
5
27
(
＋
)
3
5
3
=
(
＋
3
)
15
=
＋
3
×
3
15
=
＋
9
(3)
3
3
(
＋
3
)
3
=
3
＋
3
3
=
3
＋
3
(4)
3
3
(
−
5
)
3
=
3
−
5
3
=
3
−
5
(5)
3
75
2
(
＋
)
3
3
2
=
(
5
＋
)
6
=
5
×
3
＋
6
=
15
＋
(6)
75
7
12
(
＋
)
3
7
3
=
5
(
＋
2
)
21
=
5
＋
10
×
3
21
=
5
＋
30
(7)
2
8
(
−
7
)
2
2
=
(
2
−
7
)
2
=
2
×
2
−
7
2
=
4
−
7
(8)
27
5
3
(
＋
)
3
5
3
=
3
(
＋
)
15
=
3
＋
3
×
3
15
=
3
＋
9
(9)
5
45
3
(
＋
)
5
5
3
=
(
3
＋
)
15
=
3
×
5
＋
15
=
15
＋
(10)
125
20
(
7
＋
)
5
5
=
5
(
7
＋
2
)
5
=
35
＋
10
×
5
5
=
35
＋
50