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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
20
5
−
10
(2)
45
45
2
+
(3)
12
27
+
(4)
20
45
9
+
10
(5)
63
175
−4
−
6
(6)
18
8
−
9
(7)
27
75
−7
+
(8)
12
75
−
6
(9)
28
28
+
9
(10)
8
50
+
10
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
20
20
5
−
10
5
5
=
5
×
2
−
10
×
2
5
=
−10
(2)
45
45
2
+
5
5
=
2
×
3
+
3
5
=
9
(3)
12
27
+
3
3
=
2
+
3
3
=
5
(4)
20
45
9
+
10
5
5
=
9
×
2
+
10
×
3
5
=
48
(5)
63
175
−4
−
6
7
7
=
−4
×
3
−
6
×
5
7
=
−42
(6)
18
8
−
9
2
2
=
3
−
9
×
2
2
=
−15
(7)
27
75
−7
+
3
3
=
−7
×
3
+
5
3
=
−16
(8)
12
75
−
6
3
3
=
2
−
6
×
5
3
=
−28
(9)
28
28
+
9
7
7
=
2
+
9
×
2
7
=
20
(10)
8
50
+
10
2
2
=
2
+
10
×
5
2
=
52