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©2025 数学クラブ http://sugaku.club/
月 日( )
● 次の計算をしなさい
[1C0-10]
(1)
2
2
0.74
−
0.64
(2)
2
2
6.4
−
2.4
(3)
2
2
4.64
−
3.64
(4)
2
2
5.3
−
6.3
(5)
2
2
7.65
−
6.65
(6)
2
2
0.69
−
0.59
(7)
2
2
8.27
−
9.27
(8)
2
2
6.54
−
7.54
(9)
2
2
3.77
−
4.77
(10)
2
2
0.58
−
0.88
(11)
2
2
3.5
−
8.5
(12)
2
2
0.56
−
0.36
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
2
0.74
−
0.64
=
(
0.74
−
0.64
)
(
0.74
+
0.64
)
=
0.1
×
1.38
=
0.138
(2)
2
2
6.4
−
2.4
=
(
6.4
−
2.4
)
(
6.4
+
2.4
)
=
4
×
8.8
=
35.2
(3)
2
2
4.64
−
3.64
=
(
4.64
−
3.64
)
(
4.64
+
3.64
)
=
8.28
(4)
2
2
5.3
−
6.3
=
(
5.3
−
6.3
)
(
5.3
+
6.3
)
=
−11.6
(5)
2
2
7.65
−
6.65
=
(
7.65
−
6.65
)
(
7.65
+
6.65
)
=
14.3
(6)
2
2
0.69
−
0.59
=
(
0.69
−
0.59
)
(
0.69
+
0.59
)
=
0.1
×
1.28
=
0.128
(7)
2
2
8.27
−
9.27
=
(
8.27
−
9.27
)
(
8.27
+
9.27
)
=
−17.54
(8)
2
2
6.54
−
7.54
=
(
6.54
−
7.54
)
(
6.54
+
7.54
)
=
−14.08
(9)
2
2
3.77
−
4.77
=
(
3.77
−
4.77
)
(
3.77
+
4.77
)
=
−8.54
(10)
2
2
0.58
−
0.88
=
(
0.58
−
0.88
)
(
0.58
+
0.88
)
=
−0.3
×
1.46
=
−0.438
(11)
2
2
3.5
−
8.5
=
(
3.5
−
8.5
)
(
3.5
+
8.5
)
=
−5
×
12
=
−60
(12)
2
2
0.56
−
0.36
=
(
0.56
−
0.36
)
(
0.56
+
0.36
)
=
0.2
×
0.92
=
0.184