[文字サイズの変更]
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▲
©2025 数学クラブ http://sugaku.club/
月 日( )
● 次の式を,文字式の表し方にしたがって書きましょう
[076-00]
(1)
a
÷
(
−4
)
−
b
(2)
a
÷
b
+
7
(3)
a
×
b
×
(
−2
)
(4)
a
×
b
−
c
×
(
−2
)
(5)
a
×
b
+
c
÷
d
+
8
(6)
a
÷
2
−
b
×
c
(7)
(
−9
)
×
a
+
b
(8)
a
÷
b
+
c
÷
8
−
d
(9)
a
×
7
÷
b
+
c
÷
d
(10)
3
×
a
÷
b
(11)
(
−8
)
×
a
×
b
÷
c
−
d
(12)
a
×
(
−2
)
×
b
−
c
÷
d
(13)
(
−5
)
×
a
÷
b
+
c
×
d
(14)
a
÷
b
+
c
÷
(
−10
)
(15)
4
÷
a
+
b
(16)
a
×
b
÷
5
(17)
a
×
b
−
8
×
c
+
d
(18)
5
×
a
−
b
÷
c
−
d
(19)
a
×
b
÷
3
+
c
(20)
a
÷
(
−9
)
+
b
×
c
÷
d
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
a
÷
(
−4
)
−
b
a
=
−
−
b
4
(2)
a
÷
b
+
7
a
=
+
7
b
(3)
a
×
b
×
(
−2
)
=
−2
a
b
(4)
a
×
b
−
c
×
(
−2
)
=
a
b
+
2
c
(5)
a
×
b
+
c
÷
d
+
8
c
=
a
b
+
+
8
d
(6)
a
÷
2
−
b
×
c
a
=
−
b
c
2
(7)
(
−9
)
×
a
+
b
=
−9
a
+
b
(8)
a
÷
b
+
c
÷
8
−
d
a
c
=
+
−
d
b
8
(9)
a
×
7
÷
b
+
c
÷
d
7
a
c
=
+
b
d
(10)
3
×
a
÷
b
3
a
=
b
(11)
(
−8
)
×
a
×
b
÷
c
−
d
8
a
b
=
−
−
d
c
(12)
a
×
(
−2
)
×
b
−
c
÷
d
c
=
−2
a
b
−
d
(13)
(
−5
)
×
a
÷
b
+
c
×
d
5
a
=
−
+
c
d
b
(14)
a
÷
b
+
c
÷
(
−10
)
a
c
=
−
b
10
(15)
4
÷
a
+
b
4
=
+
b
a
(16)
a
×
b
÷
5
a
b
=
5
(17)
a
×
b
−
8
×
c
+
d
=
a
b
−
8
c
+
d
(18)
5
×
a
−
b
÷
c
−
d
b
=
5
a
−
−
d
c
(19)
a
×
b
÷
3
+
c
a
b
=
+
c
3
(20)
a
÷
(
−9
)
+
b
×
c
÷
d
a
b
c
=
−
+
9
d