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©2024 数学クラブ http://sugaku.club/
月 日( )
● 計算しなさい
[1Q1-00]
(1)
18
50
+
(2)
45
20
8
−
8
(3)
20
125
+
(4)
75
12
−7
+
9
(5)
20
125
−6
−
5
(6)
18
8
10
+
(7)
175
175
−2
+
(8)
28
28
3
+
4
(9)
12
12
−
7
(10)
12
75
−10
+
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
18
50
+
2
2
=
3
+
5
2
=
8
(2)
45
20
8
−
8
5
5
=
8
×
3
−
8
×
2
5
=
8
(3)
20
125
+
5
5
=
2
+
5
5
=
7
(4)
75
12
−7
+
9
3
3
=
−7
×
5
+
9
×
2
3
=
−17
(5)
20
125
−6
−
5
5
5
=
−6
×
2
−
5
×
5
5
=
−37
(6)
18
8
10
+
2
2
=
10
×
3
+
2
2
=
32
(7)
175
175
−2
+
7
7
=
−2
×
5
+
5
7
=
−5
(8)
28
28
3
+
4
7
7
=
3
×
2
+
4
×
2
7
=
14
(9)
12
12
−
7
3
3
=
2
−
7
×
2
3
=
−12
(10)
12
75
−10
+
3
3
=
−10
×
2
+
5
3
=
−15