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©2024 数学クラブ http://sugaku.club/
月 日( )
● 次の計算をしなさい
[1C0-10]
(1)
2
2
0.76
−
0.46
(2)
2
2
56.9
−
46.9
(3)
2
2
5.1
−
6.1
(4)
2
2
0.55
−
0.25
(5)
2
2
8.6
−
6.6
(6)
2
2
4.73
−
5.73
(7)
2
2
0.61
−
0.41
(8)
2
2
0.81
−
0.51
(9)
2
2
5.7
−
2.7
(10)
2
2
6.2
−
5.2
(11)
2
2
0.65
−
0.55
(12)
2
2
4.3
−
3.3
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
2
0.76
−
0.46
=
(
0.76
−
0.46
)
(
0.76
+
0.46
)
=
0.3
×
1.22
=
0.366
(2)
2
2
56.9
−
46.9
=
(
56.9
−
46.9
)
(
56.9
+
46.9
)
=
10
×
103.8
=
1038
(3)
2
2
5.1
−
6.1
=
(
5.1
−
6.1
)
(
5.1
+
6.1
)
=
−11.2
(4)
2
2
0.55
−
0.25
=
(
0.55
−
0.25
)
(
0.55
+
0.25
)
=
0.3
×
0.8
=
0.24
(5)
2
2
8.6
−
6.6
=
(
8.6
−
6.6
)
(
8.6
+
6.6
)
=
2
×
15.2
=
30.4
(6)
2
2
4.73
−
5.73
=
(
4.73
−
5.73
)
(
4.73
+
5.73
)
=
−10.46
(7)
2
2
0.61
−
0.41
=
(
0.61
−
0.41
)
(
0.61
+
0.41
)
=
0.2
×
1.02
=
0.204
(8)
2
2
0.81
−
0.51
=
(
0.81
−
0.51
)
(
0.81
+
0.51
)
=
0.3
×
1.32
=
0.396
(9)
2
2
5.7
−
2.7
=
(
5.7
−
2.7
)
(
5.7
+
2.7
)
=
3
×
8.4
=
25.2
(10)
2
2
6.2
−
5.2
=
(
6.2
−
5.2
)
(
6.2
+
5.2
)
=
11.4
(11)
2
2
0.65
−
0.55
=
(
0.65
−
0.55
)
(
0.65
+
0.55
)
=
0.1
×
1.2
=
0.12
(12)
2
2
4.3
−
3.3
=
(
4.3
−
3.3
)
(
4.3
+
3.3
)
=
7.6