题目内容
|
2-
|
| ||||||||||||||||
| 3.14×0.52+3.14×(2.5×0.3) | 25.12÷(3.14×22 ) |
(1)
×16.31-
×2.31,
=
×(16.31-2.31),
=
×14,
=10;
(2)2-
÷
-
,
=2-
-
,
=2-(
+
),
=2-2,
=0;
(3)
+
÷
,
=
+2,
=2
;
(4)3.14×0.52+3.14×(2.5×0.3),
=3.14×(0.52+2.5×0.3),
=3.14×(0.25+0.75),
=3.14×1,
=3.14;
(5)25.12÷(3.14×22),
=25.12÷(3.14×4),
=25.12÷3.14÷4,
=8÷4,
=2.
| 5 |
| 7 |
| 5 |
| 7 |
=
| 5 |
| 7 |
=
| 5 |
| 7 |
=10;
(2)2-
| 6 |
| 13 |
| 9 |
| 26 |
| 2 |
| 3 |
=2-
| 4 |
| 3 |
| 2 |
| 3 |
=2-(
| 4 |
| 3 |
| 2 |
| 3 |
=2-2,
=0;
(3)
| 1 |
| 5 |
| 4 |
| 5 |
| 2 |
| 5 |
=
| 1 |
| 5 |
=2
| 1 |
| 5 |
(4)3.14×0.52+3.14×(2.5×0.3),
=3.14×(0.52+2.5×0.3),
=3.14×(0.25+0.75),
=3.14×1,
=3.14;
(5)25.12÷(3.14×22),
=25.12÷(3.14×4),
=25.12÷3.14÷4,
=8÷4,
=2.
练习册系列答案
相关题目