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©2025 数学クラブ http://sugaku.club/
月 日( )
● 計算しなさい
[1Q2-00]
(1)
1
125
−
7
5
(2)
1
1
+
50
8
(3)
1
1
+
2
50
(4)
45
5
−
45
(5)
3
1
+
3
12
(6)
12
1
+
27
(7)
5
7
−
125
5
(8)
7
5
4
−
175
(9)
8
1
+
2
(10)
18
1
+
2
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
1
125
−
7
5
1
5
=
−
7
×
5
5
5
5
=
−
7
×
5
5
174
5
=
−
5
(2)
1
1
+
50
8
1
1
=
+
2
5
2
2
2
2
=
+
5
×
2
2
×
2
7
2
=
20
(3)
1
1
+
2
50
1
1
=
+
2
2
5
2
2
=
+
2
5
×
2
3
2
=
5
(4)
45
5
−
45
5
5
=
3
−
5
3
5
5
5
=
3
−
3
×
5
8
5
=
3
(5)
3
1
+
3
12
3
1
=
+
3
3
2
3
3
3
=
+
3
2
×
3
7
3
=
6
(6)
12
1
+
27
3
1
=
2
+
3
3
3
3
=
2
+
3
×
3
19
3
=
9
(7)
5
7
−
125
5
5
7
=
−
5
5
5
5
5
5
7
=
−
5
×
5
5
6
5
=
−
5
(8)
7
5
4
−
175
7
5
=
4
−
7
5
7
7
5
=
4
−
5
×
7
27
7
=
7
(9)
8
1
+
2
2
1
=
2
+
2
2
2
=
2
+
2
5
2
=
2
(10)
18
1
+
2
2
1
=
3
+
2
2
2
=
3
+
2
7
2
=
2