［文字サイズの変更］
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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
7.82
−
6.82
(2)
2
2
2.46
−
3.46
(3)
2
2
23.9
−
13.9
(4)
2
2
0.46
−
0.36
(5)
2
2
68.1
−
58.1
(6)
2
2
4.4
−
3.4
(7)
2
2
4.2
−
6.2
(8)
2
2
28.6
−
18.6
(9)
2
2
84.8
−
94.8
(10)
2
2
5.9
−
3.9
(11)
2
2
59.9
−
49.9
(12)
2
2
6.1
−
5.1
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
2
7.82
−
6.82
=
(
7.82
−
6.82
)
(
7.82
＋
6.82
)
=
14.64
(2)
2
2
2.46
−
3.46
=
(
2.46
−
3.46
)
(
2.46
＋
3.46
)
=
−5.92
(3)
2
2
23.9
−
13.9
=
(
23.9
−
13.9
)
(
23.9
＋
13.9
)
=
10
×
37.8
=
378
(4)
2
2
0.46
−
0.36
=
(
0.46
−
0.36
)
(
0.46
＋
0.36
)
=
0.1
×
0.82
=
0.082
(5)
2
2
68.1
−
58.1
=
(
68.1
−
58.1
)
(
68.1
＋
58.1
)
=
10
×
126.2
=
1262
(6)
2
2
4.4
−
3.4
=
(
4.4
−
3.4
)
(
4.4
＋
3.4
)
=
7.8
(7)
2
2
4.2
−
6.2
=
(
4.2
−
6.2
)
(
4.2
＋
6.2
)
=
−2
×
10.4
=
−20.8
(8)
2
2
28.6
−
18.6
=
(
28.6
−
18.6
)
(
28.6
＋
18.6
)
=
10
×
47.2
=
472
(9)
2
2
84.8
−
94.8
=
(
84.8
−
94.8
)
(
84.8
＋
94.8
)
=
−10
×
179.6
=
−1796
(10)
2
2
5.9
−
3.9
=
(
5.9
−
3.9
)
(
5.9
＋
3.9
)
=
2
×
9.8
=
19.6
(11)
2
2
59.9
−
49.9
=
(
59.9
−
49.9
)
(
59.9
＋
49.9
)
=
10
×
109.8
=
1098
(12)
2
2
6.1
−
5.1
=
(
6.1
−
5.1
)
(
6.1
＋
5.1
)
=
11.2