［文字サイズの変更］
▼
▲
©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 計算しなさい
[06C-10]
(1)
(
−
0.4
)
÷
(
−
0.8
)
(2)
(
−
0.16
)
÷
(
−
0.8
)
(3)
(
＋
0.6
)
÷
(
＋
0.6
)
(4)
(
−
0.9
)
×
(
＋
0.9
)
(5)
(
−
0.02
)
÷
(
＋
0.1
)
(6)
(
＋
0.6
)
×
(
−
0.7
)
(7)
(
−
0.7
)
×
(
＋
0.9
)
(8)
(
＋
0.5
)
×
(
−
0.2
)
(9)
(
＋
0.2
)
×
(
＋
0.9
)
(10)
(
＋
0.8
)
÷
(
−
1
)
(11)
(
＋
0.7
)
÷
(
−
0.7
)
(12)
(
＋
0.05
)
÷
(
＋
0.5
)
(13)
(
＋
0.6
)
×
(
−
0.7
)
(14)
(
＋
0.08
)
÷
(
−
0.1
)
(15)
(
−
0.8
)
÷
(
＋
0.8
)
(16)
(
−
0.2
)
×
(
＋
0.4
)
(17)
(
−
0.48
)
÷
(
−
0.6
)
(18)
(
−
0.02
)
÷
(
−
0.1
)
(19)
(
−
0.9
)
×
(
＋
0.8
)
(20)
(
＋
0.6
)
÷
(
＋
1
)
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
(
−
0.4
)
÷
(
−
0.8
)
=
＋
(
0.4
÷
0.8
)
=
＋
0.5
(2)
(
−
0.16
)
÷
(
−
0.8
)
=
＋
(
0.16
÷
0.8
)
=
＋
0.2
(3)
(
＋
0.6
)
÷
(
＋
0.6
)
=
＋
(
0.6
÷
0.6
)
=
＋
1
(4)
(
−
0.9
)
×
(
＋
0.9
)
=
−
(
0.9
×
0.9
)
=
−0.81
(5)
(
−
0.02
)
÷
(
＋
0.1
)
=
−
(
0.02
÷
0.1
)
=
−0.2
(6)
(
＋
0.6
)
×
(
−
0.7
)
=
−
(
0.6
×
0.7
)
=
−0.42
(7)
(
−
0.7
)
×
(
＋
0.9
)
=
−
(
0.7
×
0.9
)
=
−0.63
(8)
(
＋
0.5
)
×
(
−
0.2
)
=
−
(
0.5
×
0.2
)
=
−0.1
(9)
(
＋
0.2
)
×
(
＋
0.9
)
=
＋
(
0.2
×
0.9
)
=
＋
0.18
(10)
(
＋
0.8
)
÷
(
−
1
)
=
−
(
0.8
÷
1
)
=
−0.8
(11)
(
＋
0.7
)
÷
(
−
0.7
)
=
−
(
0.7
÷
0.7
)
=
−1
(12)
(
＋
0.05
)
÷
(
＋
0.5
)
=
＋
(
0.05
÷
0.5
)
=
＋
0.1
(13)
(
＋
0.6
)
×
(
−
0.7
)
=
−
(
0.6
×
0.7
)
=
−0.42
(14)
(
＋
0.08
)
÷
(
−
0.1
)
=
−
(
0.08
÷
0.1
)
=
−0.8
(15)
(
−
0.8
)
÷
(
＋
0.8
)
=
−
(
0.8
÷
0.8
)
=
−1
(16)
(
−
0.2
)
×
(
＋
0.4
)
=
−
(
0.2
×
0.4
)
=
−0.08
(17)
(
−
0.48
)
÷
(
−
0.6
)
=
＋
(
0.48
÷
0.6
)
=
＋
0.8
(18)
(
−
0.02
)
÷
(
−
0.1
)
=
＋
(
0.02
÷
0.1
)
=
＋
0.2
(19)
(
−
0.9
)
×
(
＋
0.8
)
=
−
(
0.9
×
0.8
)
=
−0.72
(20)
(
＋
0.6
)
÷
(
＋
1
)
=
＋
(
0.6
÷
1
)
=
＋
0.6