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©2018 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
28
7
(
−4
＋
)
(2)
18
2
(
9
＋
)
(3)
63
7
(
＋
7
)
(4)
7
7
3
(
＋
)
(5)
63
7
(
−
4
)
(6)
75
3
3
(
＋
)
(7)
28
7
(
＋
6
)
(8)
63
3
63
(
＋
)
(9)
12
7
12
(
＋
)
(10)
18
50
(
−1
＋
)
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
28
7
(
−4
＋
)
7
7
=
2
(
−4
＋
)
7
=
−8
＋
2
×
7
7
=
−8
＋
14
(2)
18
2
(
9
＋
)
2
2
=
3
(
9
＋
)
2
=
27
＋
3
×
2
2
=
27
＋
6
(3)
63
7
(
＋
7
)
7
7
=
3
(
＋
7
)
7
=
3
×
7
＋
21
7
=
21
＋
21
(4)
7
7
3
(
＋
)
21
=
7
＋
21
=
7
＋
(5)
63
7
(
−
4
)
7
7
=
3
(
−
4
)
7
=
3
×
7
−
12
7
=
21
−
12
(6)
75
3
3
(
＋
)
3
3
3
=
5
(
＋
)
=
5
×
3
＋
5
×
3
=
30
(7)
28
7
(
＋
6
)
7
7
=
2
(
＋
6
)
7
=
2
×
7
＋
12
7
=
14
＋
12
(8)
63
3
63
(
＋
)
7
3
7
=
3
(
＋
3
)
21
=
3
＋
9
×
7
21
=
3
＋
63
(9)
12
7
12
(
＋
)
3
7
3
=
2
(
＋
2
)
21
=
2
＋
4
×
3
21
=
2
＋
12
(10)
18
50
(
−1
＋
)
2
2
=
3
(
−1
＋
5
)
2
=
−3
＋
15
×
2
2
=
−3
＋
30