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©2025 数学クラブ http://sugaku.club/
月 日( )
● 計算しなさい
[1Q1-00]
(1)
20
45
+
2
(2)
45
45
+
(3)
125
45
−3
+
(4)
18
50
−
(5)
45
45
−3
+
(6)
8
50
−5
+
7
(7)
20
20
−
9
(8)
12
75
+
(9)
8
8
9
+
(10)
45
45
+
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
20
45
+
2
5
5
=
2
+
2
×
3
5
=
8
(2)
45
45
+
5
5
=
3
+
3
5
=
6
(3)
125
45
−3
+
5
5
=
−3
×
5
+
3
5
=
−12
(4)
18
50
−
2
2
=
3
−
5
2
=
−2
(5)
45
45
−3
+
5
5
=
−3
×
3
+
3
5
=
−6
(6)
8
50
−5
+
7
2
2
=
−5
×
2
+
7
×
5
2
=
25
(7)
20
20
−
9
5
5
=
2
−
9
×
2
5
=
−16
(8)
12
75
+
3
3
=
2
+
5
3
=
7
(9)
8
8
9
+
2
2
=
9
×
2
+
2
2
=
20
(10)
45
45
+
5
5
=
3
+
3
5
=
6