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©2026 数学クラブ http://sugaku.club/
月 日( )
● 次の計算をしなさい
[1C0-10]
(1)
2
2
6.24
−
5.24
(2)
2
2
3.6
−
5.6
(3)
2
2
0.21
−
0.41
(4)
2
2
0.62
−
0.82
(5)
2
2
5.6
−
6.6
(6)
2
2
8.4
−
6.4
(7)
2
2
6.2
−
7.2
(8)
2
2
0.73
−
0.23
(9)
2
2
5.72
−
4.72
(10)
2
2
0.22
−
0.72
(11)
2
2
0.58
−
0.28
(12)
2
2
4.5
−
6.5
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
2
6.24
−
5.24
=
(
6.24
−
5.24
)
(
6.24
+
5.24
)
=
11.48
(2)
2
2
3.6
−
5.6
=
(
3.6
−
5.6
)
(
3.6
+
5.6
)
=
−2
×
9.2
=
−18.4
(3)
2
2
0.21
−
0.41
=
(
0.21
−
0.41
)
(
0.21
+
0.41
)
=
−0.2
×
0.62
=
−0.124
(4)
2
2
0.62
−
0.82
=
(
0.62
−
0.82
)
(
0.62
+
0.82
)
=
−0.2
×
1.44
=
−0.288
(5)
2
2
5.6
−
6.6
=
(
5.6
−
6.6
)
(
5.6
+
6.6
)
=
−12.2
(6)
2
2
8.4
−
6.4
=
(
8.4
−
6.4
)
(
8.4
+
6.4
)
=
2
×
14.8
=
29.6
(7)
2
2
6.2
−
7.2
=
(
6.2
−
7.2
)
(
6.2
+
7.2
)
=
−13.4
(8)
2
2
0.73
−
0.23
=
(
0.73
−
0.23
)
(
0.73
+
0.23
)
=
0.5
×
0.96
=
0.48
(9)
2
2
5.72
−
4.72
=
(
5.72
−
4.72
)
(
5.72
+
4.72
)
=
10.44
(10)
2
2
0.22
−
0.72
=
(
0.22
−
0.72
)
(
0.22
+
0.72
)
=
−0.5
×
0.94
=
−0.47
(11)
2
2
0.58
−
0.28
=
(
0.58
−
0.28
)
(
0.58
+
0.28
)
=
0.3
×
0.86
=
0.258
(12)
2
2
4.5
−
6.5
=
(
4.5
−
6.5
)
(
4.5
+
6.5
)
=
−2
×
11
=
−22