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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[1Q3-00]
(1)
75
27
(
−
8
)
(2)
45
5
(
9
＋
)
(3)
3
3
(
＋
9
)
(4)
2
18
(
＋
10
)
(5)
20
5
7
(
＋
)
(6)
20
5
(
−1
＋
)
(7)
27
12
3
(
＋
)
(8)
2
7
18
(
＋
)
(9)
18
2
2
(
＋
)
(10)
5
5
7
(
＋
)
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
75
27
(
−
8
)
3
3
=
5
(
3
−
8
)
3
=
15
×
3
−
40
3
=
45
−
40
(2)
45
5
(
9
＋
)
5
5
=
3
(
9
＋
)
5
=
27
＋
3
×
5
5
=
27
＋
15
(3)
3
3
(
＋
9
)
3
=
3
＋
9
3
=
3
＋
9
(4)
2
18
(
＋
10
)
2
2
=
(
3
＋
10
)
2
=
3
×
2
＋
10
2
=
6
＋
10
(5)
20
5
7
(
＋
)
5
5
7
=
2
(
＋
)
35
=
2
×
5
＋
2
35
=
10
＋
2
(6)
20
5
(
−1
＋
)
5
5
=
2
(
−1
＋
)
5
=
−2
＋
2
×
5
5
=
−2
＋
10
(7)
27
12
3
(
＋
)
3
3
3
=
3
(
2
＋
)
=
6
×
3
＋
3
×
3
=
27
(8)
2
7
18
(
＋
)
2
7
2
=
(
＋
3
)
14
=
＋
3
×
2
14
=
＋
6
(9)
18
2
2
(
＋
)
2
2
2
=
3
(
＋
)
=
3
×
2
＋
3
×
2
=
12
(10)
5
5
7
(
＋
)
35
=
5
＋
35
=
5
＋