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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
5.11
−
4.11
(2)
2
2
0.43
−
0.33
(3)
2
2
0.59
−
0.89
(4)
2
2
6.3
−
7.3
(5)
2
2
2.72
−
3.72
(6)
2
2
59.8
−
49.8
(7)
2
2
0.28
−
0.48
(8)
2
2
8.6
−
4.6
(9)
2
2
4.18
−
3.18
(10)
2
2
3.2
−
2.2
(11)
2
2
53.6
−
43.6
(12)
2
2
7.7
−
2.7
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
2
5.11
−
4.11
=
(
5.11
−
4.11
)
(
5.11
+
4.11
)
=
9.22
(2)
2
2
0.43
−
0.33
=
(
0.43
−
0.33
)
(
0.43
+
0.33
)
=
0.1
×
0.76
=
0.076
(3)
2
2
0.59
−
0.89
=
(
0.59
−
0.89
)
(
0.59
+
0.89
)
=
−0.3
×
1.48
=
−0.444
(4)
2
2
6.3
−
7.3
=
(
6.3
−
7.3
)
(
6.3
+
7.3
)
=
−13.6
(5)
2
2
2.72
−
3.72
=
(
2.72
−
3.72
)
(
2.72
+
3.72
)
=
−6.44
(6)
2
2
59.8
−
49.8
=
(
59.8
−
49.8
)
(
59.8
+
49.8
)
=
10
×
109.6
=
1096
(7)
2
2
0.28
−
0.48
=
(
0.28
−
0.48
)
(
0.28
+
0.48
)
=
−0.2
×
0.76
=
−0.152
(8)
2
2
8.6
−
4.6
=
(
8.6
−
4.6
)
(
8.6
+
4.6
)
=
4
×
13.2
=
52.8
(9)
2
2
4.18
−
3.18
=
(
4.18
−
3.18
)
(
4.18
+
3.18
)
=
7.36
(10)
2
2
3.2
−
2.2
=
(
3.2
−
2.2
)
(
3.2
+
2.2
)
=
5.4
(11)
2
2
53.6
−
43.6
=
(
53.6
−
43.6
)
(
53.6
+
43.6
)
=
10
×
97.2
=
972
(12)
2
2
7.7
−
2.7
=
(
7.7
−
2.7
)
(
7.7
+
2.7
)
=
5
×
10.4
=
52