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©2019 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
125
3
5
(
＋
)
(2)
7
3
28
(
＋
)
(3)
8
2
(
6
＋
)
(4)
18
3
2
(
＋
)
(5)
175
7
(
＋
3
)
(6)
3
3
(
8
＋
)
(7)
7
7
(
＋
7
)
(8)
7
7
(
−
7
)
(9)
45
20
7
(
＋
)
(10)
5
125
2
(
＋
)
©2019 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
125
3
5
(
＋
)
5
3
5
=
5
(
＋
)
15
=
5
＋
5
×
5
15
=
5
＋
25
(2)
7
3
28
(
＋
)
7
3
7
=
(
＋
2
)
21
=
＋
2
×
7
21
=
＋
14
(3)
8
2
(
6
＋
)
2
2
=
2
(
6
＋
)
2
=
12
＋
2
×
2
2
=
12
＋
4
(4)
18
3
2
(
＋
)
2
3
2
=
3
(
＋
)
6
=
3
＋
3
×
2
6
=
3
＋
6
(5)
175
7
(
＋
3
)
7
7
=
5
(
＋
3
)
7
=
5
×
7
＋
15
7
=
35
＋
15
(6)
3
3
(
8
＋
)
3
=
8
＋
3
3
=
8
＋
3
(7)
7
7
(
＋
7
)
7
=
7
＋
7
7
=
7
＋
7
(8)
7
7
(
−
7
)
7
=
7
−
7
7
=
7
−
7
(9)
45
20
7
(
＋
)
5
5
7
=
3
(
2
＋
)
35
=
6
×
5
＋
3
35
=
30
＋
3
(10)
5
125
2
(
＋
)
5
5
2
=
(
5
＋
)
10
=
5
×
5
＋
10
=
25
＋