[文字サイズの変更]
▼
▲
©2025 数学クラブ http://sugaku.club/
月 日( )
● くふうして計算
[06L-00]
(1)
(
+
25
)
×
(
+
36
)
×
(
+
4
)
(2)
(
−125
)
×
(
+
31
)
×
(
−8
)
(3)
(
−35
)
×
(
−82
)
×
(
−2
)
(4)
(
−1.25
)
×
(
−0.17
)
×
(
+
8
)
(5)
(
−2.5
)
×
(
−2.7
)
×
(
−4
)
(6)
(
−1.25
)
×
(
+
0.46
)
×
(
−8
)
(7)
(
+
3.5
)
×
(
+
9.8
)
×
(
+
2
)
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
(
+
25
)
×
(
+
36
)
×
(
+
4
)
=
(
+
25
)
×
(
+
4
)
×
(
+
36
)
=
(
+
100
)
×
(
+
36
)
=
3600
(2)
(
−125
)
×
(
+
31
)
×
(
−8
)
=
(
−125
)
×
(
−8
)
×
(
+
31
)
=
(
+
1000
)
×
(
+
31
)
=
31000
(3)
(
−35
)
×
(
−82
)
×
(
−2
)
=
(
−35
)
×
(
−2
)
×
(
−82
)
=
(
+
70
)
×
(
−82
)
=
−5740
(4)
(
−1.25
)
×
(
−0.17
)
×
(
+
8
)
=
(
−1.25
)
×
(
+
8
)
×
(
−0.17
)
=
(
−10
)
×
(
−0.17
)
=
1.7
(5)
(
−2.5
)
×
(
−2.7
)
×
(
−4
)
=
(
−2.5
)
×
(
−4
)
×
(
−2.7
)
=
(
+
10
)
×
(
−2.7
)
=
−27
(6)
(
−1.25
)
×
(
+
0.46
)
×
(
−8
)
=
(
−1.25
)
×
(
−8
)
×
(
+
0.46
)
=
(
+
10
)
×
(
+
0.46
)
=
4.6
(7)
(
+
3.5
)
×
(
+
9.8
)
×
(
+
2
)
=
(
+
3.5
)
×
(
+
2
)
×
(
+
9.8
)
=
(
+
7
)
×
(
+
9.8
)
=
68.6
(1)
3600
(2)
31000
(3)
−5740
(4)
1.7
(5)
−27
(6)
4.6
(7)
68.6